The three places below where Canadian PM Trudeau, Australian PM Turnbull and former U.S President Obama came, have gotten on trend.
Street-side Banh mi shop
The street-side Banh mi (Vietnamese bread) shop in Hoi An welcoming Australian PM Malcolm Turnbull suddenly get crowded after his footprint. The shop owner, Mrs Doan Thi Van were surprised with the presence of a foreign leader and feels honor to serve him.

Australian PM used "banh mi" during his trip to Da Nang city for APEC 2017 Summit

At the first look, the shop seems to be shanty, with no signboard. There‘s just an old glass chest with all the fillings for making Banh mi inside such as: pate, pork, vegetables, mayonnaise, Vietnamese sauce… It’s priced less than $1 for each bread roll here, a really typical street-side food store in Vietnam.
Touring with Australian-Vietnamese celebrity chef Luke Nguyen, Mr Turnbull said the bread roll with pâté, pork, fresh herbs and pickled vegetables, was "superb". Waiting for the bread, Australia PM listened to Luke Nguyen revealing about Banh mi recipe. "This is a totally cosmopolitan dish- a French baguette and a Vietnamese filling," Mr Turnbull said, adding that 75 per cent of the bread roll was made with Australian wheat. "This is what free trade and open markets enables us to have - great Australian wheat in Vietnam and more opportunities for Australian farmers."
Mr Turnbull also met with two local women dining on beef noodle soup, pho, who posed for photographs with Mr Turnbull and Mr Nguyen.
Vy Cafe
Vy Cafe lies among the most recommended coffee shops in HCMC recently, after the visit of Canadian PM Justin Trudeau on Nov 9. Located in a modest area at Le Thanh Ton – Le Anh Xuan crossroad, the varied menu of 24/24h coffee shop pleased numerous visitors. The area of both indoor and outdoor serves not only coffee but also lemonade juice with at least 30.000 VND (1.5 USD) per drink. 

Canadian PM enjoys Vietnamese milk coffee at Vy Cafe, Da Nang city

Canadian Prime Minister Justin Trudeau enjoyed Saigon sour milk coffee in Vietnam with the name Moka Robusta in menu. The shop earlier welcome other politicians such as Mary Etta Tarnowka, US Consul General in HCMC. After the visit of Canadian PM, a flux of customers come here, try to order the same drink with the Canadian leader.

Bun cha Huong Lien restaurant
One year ago, Bun Cha Huong Lien—a traditional Hanoi noodle joint set a hot trend, after American President Barack Obama along with famous chef Anthony Bourdain coming and recording for series Parts Unknown aired on CNN. The well-known restaurant lies in Le Van Huu Road, Hanoi.  The restaurant where Anthony Bourdain and the President of the United States shared a table at, has been open for two decades.

U.S President Barack Obama enjoys "bun cha" during his official visit to Vietnam on 2016

Then, the customers coming to the restaurant really curious with combo “Obama bun cha”, the set used by former U.S president. The 85.000 VNĐ (4USD) set includes bun cha, fried seafood roll and Vietnamese beer. Not only attracting Vietnamese locals, foreign visitors to Hanoi also pick this as a favorite choice.