Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhien lang » khien bang, hieu lang, nhan lang
tong cong » trong cong, cong cong, dung cong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban
va tong » va thong, va tuong, va trong
thien » thieu, tien, hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: thien nhien lang - ((thanh trung) or (canh tranh)) va tong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thien nhien lang - ((thanh trung) OR (canh tranh)) va tong cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: thien nhien lang - ((thanh trung) or (canh tranh)) va tong cong tan toan ban*.