Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
bang cong » dang cong, bang song, hang cong
cong manh » cong danh, duong manh, cong thanh
tranh da » tranh dau, trinh da, tranh ha
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
da bang » dau bang, da nang, da dang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - canh tranh da bang cong manh ((toan cau) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chiet tach)) - canh tranh da bang cong manh ((toan cau) OR (toan tap))~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - canh tranh da bang cong manh ((toan cau) OR (toan tap))*.