Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
ban thanh » ban hanh, ban hang
hoc hieu » hoc thieu, hoc hien, doc hieu
ban than » van thanh, ban hang, ban hanh

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 lang - hanh tranh cua nhung cong ((((ban than) OR (ban thanh))) OR (tan tran)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - hanh tranh cua nhung cong ((((ban than) OR (ban thanh))) OR (tan tran)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh tranh cua nhung cong ((((ban than) OR (ban thanh))) OR (tan tran)) cau*.