Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoc chinh » hoan chinh, hoc sinh, hoc kinh
trung tan » trung tuan, trung tran, trung tang
dung cong » dung trong
ho chinh » cho chinh, hoa chinh, do chinh
tan dung » tran dung, tin dung, van dung
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 tan dung 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 tan dung cong dan ((chan cau) OR (can cau)).
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) or (hoc chinh)) sach - thanh trung tan dung cong dan ((chan cau) or (can cau))*.