Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - canh ((trinh va) or (trinh quan)) nhung cong dan ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - canh ((trinh va) OR (trinh quan)) nhung cong dan ((phan dau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - canh ((trinh va) or (trinh quan)) nhung cong dan ((phan dau) or (phan cac))*.