Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
bien tinh » bi tinh, yen tinh, diep tinh
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac
so bien » mot bien

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

• Performing a fuzzy search may retrieve terms with similar spellings: so bien tinh - hanh ((truong quan) or (tang cua)) trong cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so bien tinh - hanh ((truong quan) OR (tang cua)) trong cong tan than cap.
• Adding a wildcard symbol may retrieve word variants: so bien tinh - hanh ((truong quan) or (tang cua)) trong cong tan than cap*.