Below are the maps for all counties and districts which make up Ho Chi Minh City.  The District 1 is considered the center of HCMC.  District 7 is a new economic zone known as South Saigon. Cu Chi is famous for its historical tunnels during the Vietnam Conflict and is a favorite tourist destination.  Click on the desired location to view a larger version with street names and Ward locations.  The Wards are in larger print and in Vietnamese, but here is a small key that may be helpful:
(Quan or Q. - District)  (Huyen or H. - County)   (Phuong or P. - District Ward)  (Xa or X. - County Ward)