Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trung hoc » trung quoc
dung cong » dung trong
trung ha » trung tam, trung cap
cong tac » cong ty
tac pha » tac pham, tac phat, tac ha
pha cau » phan cau, phap cau, pha cac

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 - thanh ((trung ha) or (trung hoc)) dung cong tac pha cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((trung ha) OR (trung hoc)) dung cong tac pha cau.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((trung ha) or (trung hoc)) dung cong tac pha cau*.