Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cap » khan cap, thanh lap, thanh cac
ho hieu » ho chieu, hoi hieu, nho hieu
hoc tai » hoc dai, hoc bai, hoc giai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trang ((((hoc tai) or (hoc hien))) or (hoc tap)) cong tac than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trang ((((hoc tai) OR (hoc hien))) OR (hoc tap)) cong tac than cap.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trang ((((hoc tai) or (hoc hien))) or (hoc tap)) cong tac than cap*.