EQ1: Singapore has a small land and an overgrowing population. Their land is also not enough to grow lots of crops. There are even some resources they are unable to get on their land. Thus, they need to get these important resources from other countries. The way to get these resources is to maintain a good relationship with them. Therefore, Singapore helped Vietnam to build their country.
EQ2:Singapore helped in Vietnam's urban planning. Thus, some of the houses seen there look similar to those in Singapore, an example would be HDB. One of the concept is: Live, Work, Play and Learn.