Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tran tuan » tran xuan, tran thanh, tranh luan
tong cong » trong cong, cong cong, dung cong
cong tan » cong tac, cong san, cong thanh
ran cau » ban cau, can cau, tran chau
van cau » van dau, van hau, van chat

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