Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
truong cua » truong ca, truong cao, huong cua
cong thanh » dong thanh, cong trinh, cong tan
cong tac » cong ty
trai cau » tra cau, trai chan, toan cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh ((truong cua) OR (truong quan)) dang ((cong tac) or (cong thanh)) trai cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((truong cua) OR (truong quan)) dang ((cong tac) OR (cong thanh)) trai cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((truong cua) OR (truong quan)) dang ((cong tac) or (cong thanh)) trai cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((truong cua) OR (truong quan)) dang ((cong tac) or (cong thanh)) trai cau*.