Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien manh » hien hanh, tien manh, hieu manh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
dan chan » dan gian, dan ca, van chat

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

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