Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
luan hang » luan nang, luan hung, luan tang
hoc hieu » hoc thieu, hoc hien, doc hieu
luan han » luan hoan, luan phan, luan van
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, 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 hieu manh - ((hanh tang) or (hanh mang)) ((luan hang) or (luan han)) cong san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((hanh tang) OR (hanh mang)) ((luan hang) OR (luan han)) cong san than cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((hanh tang) or (hanh mang)) ((luan hang) or (luan han)) cong san than cao*.