Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thuong lap » thuong lan, thong lap, thuong lang
thuong gap » thuong mai, thuong va
doi chieu » doc hieu, doi chi, mot chieu
cong tuan » cong tan, cong thanh, cong quang
cong luan » tong luan, dong luan, cong luong
phap cau » phan cau, pha cau, phap ca

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 - thanh ((cong tuan) or (cong luan)) hang ((thuong lap) OR (thuong gap)) phap cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((cong tuan) OR (cong luan)) hang ((thuong lap) OR (thuong gap)) phap cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((cong tuan) or (cong luan)) hang ((thuong lap) OR (thuong gap)) phap cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((cong tuan) or (cong luan)) hang ((thuong lap) OR (thuong gap)) phap cau*.