Perhaps you should try some spelling variations:
thuan trong » thuat trong, nhuan trong, than trong
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
hanh tram » hanh tam, hanh trang, thanh tran
tuan tong » toan tong, toan thong, tuan duong
cong tan » cong tac, cong san, cong ty
ran cau » van cau, ban cau, can cau

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