Perhaps you should try some spelling variations:
thanh trung » thanh tung
hoan chinh » hanh chinh, hoa hinh
nhung cong » dung cong, thong cong, hang cong
hoc chinh » hoc sinh, hoc kinh
trung ha » trung hoc, trung tam, trung cap
ha nhung » hoa nhung, hay nhung, pha nhung
cong san » cong tac
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoan chinh)) sach - thanh trung ha nhung cong san ((ran cau) OR (van cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chinh) or (hoan chinh)) sach - thanh trung ha nhung cong san ((ran cau) OR (van cau))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (hoan chinh)) sach - thanh trung ha nhung cong san ((ran cau) OR (van cau))*.