Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu

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 cong) or (hang cong)) ((anh tuan) or (van ban)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh tranh cua ((nhung cong) OR (hang cong)) ((anh tuan) OR (van ban)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh tranh cua ((nhung cong) or (hang cong)) ((anh tuan) or (van ban)) cau*.