Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tram » hanh tam, hanh trang, thanh tran
tram van » tran van, tam van, trang van
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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: theo tieu xanh - hanh tram van ((nhung cong) OR (thong cong)) ((dan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tram van ((nhung cong) OR (thong cong)) ((dan toan) or (van toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tram van ((nhung cong) OR (thong cong)) ((dan toan) or (van toan)) cau*.