Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
tanh dung » thanh dung, tinh dung, manh dung
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
anh dung » anh dong, anh huong, sach dung
van toan » van tuan, van tan, van thanh
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu xanh - ((anh dung) or (tanh dung)) cua ((nhung cong) OR (thong cong)) van toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - ((anh dung) OR (tanh dung)) cua ((nhung cong) OR (thong cong)) van toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - ((anh dung) or (tanh dung)) cua ((nhung cong) OR (thong cong)) van toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - ((anh dung) or (tanh dung)) cua ((nhung cong) OR (thong cong)) van toan tap*.