Perhaps you should try some spelling variations:
chiet tach » chieu sach
doi chiet » doi chieu, doi chi, doi viet
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - canh ((tranh va) or (trinh va)) nhung ((cong dan) or (cong san)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - canh ((tranh va) OR (trinh va)) nhung ((cong dan) OR (cong san)) phan cau.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - canh ((tranh va) or (trinh va)) nhung ((cong dan) or (cong san)) phan cau*.