Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, mot chieu
tran doan » trang doan, tan doan, toan doanh
tran hoan » tran hoang, tuan hoan, tran han
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan

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