Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, hieu cach
chieu xanh » chieu sang, chieu tinh, hieu manh
tranh vat » trinh vat, tranh va, tranh van
dung cong » dung trong
vat dung » van dung, va dung, viet dung
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chiet tach) or (((chieu sach) OR (chieu xanh)))) - canh tranh vat dung cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (((chieu sach) OR (chieu xanh)))) - canh tranh vat dung cong san toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chiet tach) or (((chieu sach) OR (chieu xanh)))) - canh tranh vat dung cong san toan ban*".