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, hien hanh
tranh cua » doanh cua, manh cua
van toan » van tuan, van tan, van thanh
toan ban » van ban

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