Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh suat » trinh luat, trinh sat, trinh quan
doi chieu » doc hieu, doi chi, ho chieu
duong van » duong va, luong va, dang van
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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 suat thong ((duong manh) OR (duong van)) ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh suat thong ((duong manh) OR (duong van)) ((toan cau) OR (toan tap))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh trinh suat thong ((duong manh) OR (duong van)) ((toan cau) or (toan tap))*".