Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
truong cua » truong ca, truong cao, huong cua
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh ((truong cua) or (truong quan)) thong cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh ((truong cua) OR (truong quan)) thong cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh ((truong cua) or (truong quan)) thong cong tan toan ban*.