Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
hien hanh » dieu hanh
ha trong » hoa trong, hai trong, hat trong
cong tan » cong tac, cong thanh, cong ty
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: hoc hien hanh - ((hanh trang) or (hanh trinh)) ha trong ((cong tan) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh trang) OR (hanh trinh)) ha trong ((cong tan) OR (cong san)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh trang) or (hanh trinh)) ha trong ((cong tan) or (cong san)) toan cau*.