Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
dung cong » dung trong
theo yeu » theo tieu, thiet yeu, theo chu
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau
mang va » mang vua, hang va, dang va
bang va » hang va, ban va, trang va

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) or (theo yeu)) sach - hanh ((mang va) OR (bang va)) dung cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo yeu)) sach - hanh ((mang va) OR (bang va)) dung cong tac tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo yeu)) sach - hanh ((mang va) OR (bang va)) dung cong tac tran cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo yeu)) sach - hanh ((mang va) OR (bang va)) dung cong tac tran cau*.