Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap
doi chi » doi khi

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

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