Perhaps you should try some spelling variations:
thanh trung » thanh tung
mot chieu » doi chieu, ho chieu
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu
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: ((mot chieu) or (doi chi)) sach - thanh trung vap nhung ((cong dan) OR (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (doi chi)) sach - thanh trung vap nhung ((cong dan) OR (cong tan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (doi chi)) sach - thanh trung vap nhung ((cong dan) OR (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doi chi)) sach - thanh trung vap nhung ((cong dan) OR (cong tan)) phan cau*.