Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
tranh van » tran van, trinh van, thanh van
dung cong » dung trong
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan dau » phan tu, hang dau
tinh » trinh, dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((((chieu xanh) or (trieu tinh))) or (chieu sach)) - canh tranh van dung cong tan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu xanh) OR (trieu tinh))) OR (chieu sach)) - canh tranh van dung cong tan phan dau.
• Adding a wildcard symbol may retrieve word variants: ho ((((chieu xanh) or (trieu tinh))) or (chieu sach)) - canh tranh van dung cong tan phan dau*.