Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu xanh, hieu cach
chieu sang » chieu xanh, hieu lang, nhieu tang
canh trinh » canh tranh, hanh trinh, canh tinh
trinh van » trinh han, trinh quan, trinh toan
hang cong » dang cong, hang nong, bang cong
cong doan » cong dan, cong hoan, dong doanh
doan phan » doanh phan, toan phan, dan phan
van hang » van khang, van hoang, van thang
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((chieu sach) OR (chieu sang))) or (chiet tach)) - canh trinh van hang cong doan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sach) OR (chieu sang))) OR (chiet tach)) - canh trinh van hang cong doan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((((chieu sach) OR (chieu sang))) or (chiet tach)) - canh trinh van hang cong doan phan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sach) OR (chieu sang))) or (chiet tach)) - canh trinh van hang cong doan phan cau*.