Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
cua tong » cua dong, cua nong, cua song
toan cau » toan cao, toan ban, toan tap

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: toc ((hieu manh) OR (chieu sach)) - canh tranh ((cua tong) OR (cua cong)) cong manh toan cau~.
• Adding a wildcard symbol may retrieve word variants: toc ((hieu manh) or (chieu sach)) - canh tranh ((cua tong) or (cua cong)) cong manh toan cau*.