Perhaps you should try some spelling variations:
thanh tung » thanh cong
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
so lieu » so dieu
co lieu » cot lieu, co hieu, cu lieu
tung va » trung va, tuong va, dung va
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: ((so lieu) or (co lieu)) tinh - thanh tung va hang cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so lieu) OR (co lieu)) tinh - thanh tung va hang cong dan toan cao*.