Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
tranh va » tranh van, trang va, trinh va
tan phan » toan phan, than phan, tai phan
van phan » van phong, van thanh, luan phan
va hang » van hang, va nang, va lang

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 - canh tranh va hang cong ((tan phan) OR (van phan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - canh tranh va hang cong ((tan phan) OR (van phan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh va hang cong ((tan phan) OR (van phan)) cau*.