Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
trinh van » trinh han, trinh quan, trinh toan
van phong » van dong, hai phong
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
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 - canh trinh van phong ((cong ban) OR (cong san)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - canh trinh van phong ((cong ban) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - canh trinh van phong ((cong ban) OR (cong san)) toan cau*.