Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trinh » hanh chinh
dung cong » dung trong
tan dung » tran dung, tin dung, van dung
cong san » cong tac
san tan » van tan, san van, san tay
tan cau » toan cau, van cau, tan ca

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: ho ((chieu sach) OR (chiet tach)) - ((hanh trinh) OR (canh tranh)) tan dung cong san tan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - ((hanh trinh) or (canh tranh)) tan dung cong san tan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - ((hanh trinh) or (canh tranh)) tan dung cong san tan cau*.