Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chiet tach, chieu sang
trung hoac » trung hoc, trung hoa, trung ha
hoac thong » hoa thong, hoac khong, hoc thong
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, chinh cau, nhanh cau
can cau » van cau, ban cau, ca 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 - thanh trung hoac thong cong dan ((chan cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh trung hoac thong cong dan ((chan cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh trung hoac thong cong dan ((chan cau) or (can cau))*.