Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
theo yeu » theo tieu, thiet yeu, theo chu
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo yeu) or (theo chieu)) xanh - hanh trinh va nhung cong san ((toan cau) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo yeu) OR (theo chieu)) xanh - hanh trinh va nhung cong san ((toan cau) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ((theo yeu) or (theo chieu)) xanh - hanh trinh va nhung cong san ((toan cau) or (van ban))*.