Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat
trinh cua » tinh cua, trinh luat, trinh luan
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
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: ho chieu sach - hanh ((((trinh cua) OR (trinh quan))) or (trinh han)) dung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((((trinh cua) OR (trinh quan))) OR (trinh han)) dung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((((trinh cua) OR (trinh quan))) or (trinh han)) dung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((((trinh cua) OR (trinh quan))) or (trinh han)) dung cong san toan cau*.