Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
tang van » dang van, hoang van, trong van
cong tan » cong tac, cong san, cong thanh
than cap » thanh lap, thanh cac, than cua
khan cap » khan ap, khoan cam, phan cac
tang va » trang va, thang va, tang vat

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