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