Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh gian » trinh giang, trinh giai, tinh gian
trong tinh » truong tinh, trong kinh, trong sinh
long tinh » cong tinh, luong tin, dong tin
ho chieu » theo chieu, hoc thieu, doi chieu
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 gian) or (trinh giao)) trong ((long tinh) OR (trong tinh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh gian) OR (trinh giao)) trong ((long tinh) OR (trong tinh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh gian) or (trinh giao)) trong ((long tinh) OR (trong tinh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh gian) or (trinh giao)) trong ((long tinh) OR (trong tinh)) toan cau*.