Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
van toan » van tuan, van tan, van thanh
ban than » ban thanh, van thanh, ban hang
ho hien » hoc hien, hoa hien, ho mien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hien hanh - hanh tang luan nang cong ((van toan) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hien hanh - hanh tang luan nang cong ((van toan) OR (ban than)) cau.
• Adding a wildcard symbol may retrieve word variants: ho hien hanh - hanh tang luan nang cong ((van toan) or (ban than)) cau*.