Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
manh trung » manh tung, thanh trung, manh hung
kha nang » phap nang, ky nang, ki nang
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran 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 - manh trung ((kha nang) or (van dong)) cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - manh trung ((kha nang) OR (van dong)) cong tac tran cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - manh trung ((kha nang) or (van dong)) cong tac tran cau*.