Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
lieu tinh » trieu tinh, bien tinh
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban
toan tap » toan ban
tung he » dung he, tung ho, tang he

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((lieu tinh) or (diep tinh)) - thanh tung he thong cong tan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((lieu tinh) OR (diep tinh)) - thanh tung he thong cong tan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (diep tinh)) - thanh tung he thong cong tan ((toan cao) or (toan tap))*.