Perhaps you should try some spelling variations:
chieu xanh » chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, hieu cach
chieu sang » hieu lang, nhieu tang
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh van » tran van, trinh van, thanh van
dung cong » dung trong
van dung » van dong, xay dung, tin dung
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than man » than ma, thanh san, tran manh

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: doi ((((chieu xanh) OR (chieu sach))) OR (chieu sang)) - hanh tranh van dung cong ban than man~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((((chieu xanh) OR (chieu sach))) or (chieu sang)) - hanh tranh van dung cong ban than man~".
• Adding a wildcard symbol may retrieve word variants: doi ((((chieu xanh) OR (chieu sach))) or (chieu sang)) - hanh tranh van dung cong ban than man*.