Perhaps you should try some spelling variations:
thanh trung » thanh tung
thi chieu » thi chien, thi hieu, theo chieu
ho chieu » theo chieu, hoc thieu, doi chieu
trung ha » trung hoc, trung tam, trung cap
ha nhung » hoa nhung, hay nhung, pha nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi chieu) or (ho chieu)) sach - thanh trung ha nhung ((cong dan) OR (cong san)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi chieu) OR (ho chieu)) sach - thanh trung ha nhung ((cong dan) OR (cong san)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thi chieu) or (ho chieu)) sach - thanh trung ha nhung ((cong dan) OR (cong san)) than cau".
• Adding a wildcard symbol may retrieve word variants: ((thi chieu) or (ho chieu)) sach - thanh trung ha nhung ((cong dan) OR (cong san)) than cau*.