Perhaps you should try some spelling variations:
chieu sach » chieu sang, chieu xanh, hieu cach
canh trinh » canh tranh, hanh trinh, canh tinh
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
van hang » van khang, van hoang, van thang
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan

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