Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
trinh cua » tinh cua, trinh luat, trinh quan
hang dong » hang nong, hanh dong, lang dong
hang cong » dang cong, hang nong, bang cong
toan cau » 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 cua ((hang dong) or (hang cong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh cua ((hang dong) OR (hang cong)) tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trinh cua ((hang dong) or (hang cong)) tinh toan cau*.