Perhaps you should try some spelling variations:
chua xang » chua nang, chuc nang, chu bang
dung cong » dung trong
chu xanh » chu manh, chieu xanh, chuc danh
tranh va » tranh van, trinh va, thanh va
trang va » tran van, hang va
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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: cho ((chu xanh) OR (chua xang)) - canh ((tranh va) OR (trang va)) dung cong tan tran cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho ((chu xanh) or (chua xang)) - canh ((tranh va) OR (trang va)) dung cong tan tran cau~".
• Adding a wildcard symbol may retrieve word variants: cho ((chu xanh) or (chua xang)) - canh ((tranh va) OR (trang va)) dung cong tan tran cau*.