Perhaps you should try some spelling variations:
quan trong » gian trong
hoc thieu » toc thieu, hoc hien
cong quan » cuong quan, cong quang, tong quan
ho chieu » theo chieu, doi chieu, mot chieu
cong tan » cong tac, cong san, cong thanh
tcan cau » toan cau, toan cao, van cau
can cau » van cau, ban cau, ca cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) xanh - thanh cong quan trong cong tan ((tcan cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - thanh cong quan trong cong tan ((tcan cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc thieu)) xanh - thanh cong quan trong cong tan ((tcan cau) or (can cau))*.