Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
tien anh » tieng anh, tien manh, dien anh
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap
ha hang » nha hang, ha tang, ha dang
va hang » van hang, va nang, va lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien anh) or (thien thanh)) - thanh trung ((ha hang) or (va hang)) cong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (thien thanh)) - thanh trung ((ha hang) OR (va hang)) cong dan than cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (thien thanh)) - thanh trung ((ha hang) or (va hang)) cong dan than cao*.