Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hang cong » dang cong, hang nong, bang cong
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
tang va » trang va, tang van, thang va
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chieu sang)) - anh tang va hang cong dan ((than cap) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - anh tang va hang cong dan ((than cap) OR (khan cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - anh tang va hang cong dan ((than cap) or (khan cap))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - anh tang va hang cong dan ((than cap) or (khan cap))*.