Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
cong quang » luong quang, thong quang, duong quang
doi chieu » doc hieu, doi chi, ho chieu
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
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: doi chieu sach - hanh trinh cua thong cong quang ((toan cau) OR (van ban))~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh trinh cua thong cong quang ((toan cau) or (van ban))*.