Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » hanh chinh
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
cong manh » cong danh, duong manh, cong thanh
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - ((hanh trinh) or (canh tranh)) quan nhung cong manh ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hanh trinh) OR (canh tranh)) quan nhung cong manh ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((hanh trinh) or (canh tranh)) quan nhung cong manh ((toan cau) or (toan cao))*.