Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tong cong » trong cong, cong cong, dung cong
cong dan » cong san, cong tan, huong dan
dan giai » dan gian, luan giai, va giai
giai cao » giai ca, giai cac, giai bai
tung va » trung va, tuong va, vung 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 sach - thanh ((tung va) or (dung va)) tong cong dan giai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh ((tung va) OR (dung va)) tong cong dan giai cao.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((tung va) or (dung va)) tong cong dan giai cao*.