Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
chua xang » chua nang, chuc nang, chu bang
thoai cac » tai cac, thong cac, tho cac
doc hieu » toc thieu, hoc thieu, hoc hien
kha nang » phap nang, ky nang, ki nang
cong tan » cong tac, cong san, cong thanh
thai cao » tai cao, thuat cao, toan cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh trang ((chua xang) or (kha nang)) cong tan ((thai cao) or (thoai cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh trang ((chua xang) OR (kha nang)) cong tan ((thai cao) OR (thoai cac)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh trang ((chua xang) or (kha nang)) cong tan ((thai cao) or (thoai cac))*.