Perhaps you should try some spelling variations:
trung thanh » truong thanh
thanh trung » thanh tung
thanh nhung » thanh hung, hanh nhung, tranh nhung
nhung cong » dung cong, thong cong, hang cong
hoc chinh » hoan chinh, hoc sinh, hoc kinh
ho chinh » cho chinh, hoa chinh, do chinh
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: ((ho chinh) or (hoc chinh)) sach - thanh trung thanh nhung cong dan ((chan cau) or (can cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (hoc chinh)) sach - thanh trung thanh nhung cong dan ((chan cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) or (hoc chinh)) sach - thanh trung thanh nhung cong dan ((chan cau) or (can cau))*.