Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) or (hieu lang)) - hanh trang cua thong ((cong ban) OR (cong san)) than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (hieu lang)) - hanh trang cua thong ((cong ban) OR (cong san)) than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) or (hieu lang)) - hanh trang cua thong ((cong ban) OR (cong san)) than man".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) or (hieu lang)) - hanh trang cua thong ((cong ban) OR (cong san)) than man*.