Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
luan hoan » luan van
hoan thon » hoa thon, hoang thoan, hoan thien
thon bang » thon lang, thong mang, thong nang
bang cong » dang cong, bang song, hang cong
sang than » cang thang, dang thanh, sang tao
hoc hieu » hoc thieu, hoc hien, doc hieu
san than » san thanh, ban than, van than

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 - luan hoan thon bang cong ((san than) or (sang than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - luan hoan thon bang cong ((san than) OR (sang than)) cau*.