Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
van thanh » ban thanh, van tuan
hien anh » hien hanh, thien anh, dien anh
dan toan » van toan, dan than, manh toan
van than » van thang, van tuan, van phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien anh - canh tranh cua nhung cong ((dan toan) or (((van than) or (van thanh)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien anh - canh tranh cua nhung cong ((dan toan) OR (((van than) OR (van thanh)))) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - canh tranh cua nhung cong ((dan toan) or (((van than) or (van thanh)))) cau*.