Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
hanh trinh » canh tranh, hanh chinh
cong thanh » dong thanh, cong trinh, truong thanh
trinh van » trinh han, trinh quan, trinh toan
van hang » van khang, van hoang, van thang
cong tan » cong tac, cong san, cong ty
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: hoc ((thieu xanh) or (dieu hanh)) - hanh trinh van hang ((cong tan) OR (cong thanh)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (dieu hanh)) - hanh trinh van hang ((cong tan) OR (cong thanh)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (dieu hanh)) - hanh trinh van hang ((cong tan) OR (cong thanh)) than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (dieu hanh)) - hanh trinh van hang ((cong tan) OR (cong thanh)) than cau*.