Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
van tuan » van quan, van ban, anh tuan

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 xanh - canh tranh cua nhung cong ((((dan than) OR (dan chan))) OR (van tuan)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - canh tranh cua nhung cong ((((dan than) OR (dan chan))) or (van tuan)) cap~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - canh tranh cua nhung cong ((((dan than) OR (dan chan))) or (van tuan)) cap*.