Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh viet » ninh viet, trinh vat
viet nhung » viet hung, biet nhung, viec nhung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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 sang) or (chieu sach)) - canh trinh viet nhung ((cong dan) or (cong tan)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - canh trinh viet nhung ((cong dan) OR (cong tan)) phan tu.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (chieu sach)) - canh trinh viet nhung ((cong dan) or (cong tan)) phan tu*.