Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoang hoac » hoang hoa, hoang thoan, hang hoa
hoac khong » hoa khong, hoc khong, hay khong
khong cong » thong cong, khong cang, chong cong
anh hoang » thanh hoang, minh hoang, tnhh hoang
cong tan » cong tac, cong san, cong thanh
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao

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) or (trieu tinh)) - anh hoang hoac khong cong tan ((than cao) or (thai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (trieu tinh)) - anh hoang hoac khong cong tan ((than cao) OR (thai cao)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (trieu tinh)) - anh hoang hoac khong cong tan ((than cao) or (thai cao))*.