Perhaps you should try some spelling variations:
nhung phong » nhung phuong, nhung chong, nung phong
nhung hong » nhung chong, nhung huong, nhung cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
hoc hieu » hoc thieu, hoc hien, doc hieu
van toan » van tan, van thanh, manh toan
van tuan » van quan, van ban, anh tuan

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 tranh cua ((nhung hong) OR (nhung phong)) ((van toan) or (van tuan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh tranh cua ((nhung hong) OR (nhung phong)) ((van toan) OR (van tuan)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - hanh tranh cua ((nhung hong) OR (nhung phong)) ((van toan) or (van tuan)) ban*".