Perhaps you should try some spelling variations:
chuong cham » phuong cham, chuong chua, chuong han
chieu sach » chinh sach, chiet tach, chieu sang
chong chay » phong chay, chong phap, cong chat
trong ban » trong san, trong tan, trong quan
ho chieu » theo chieu, hoc thieu, doi chieu
than cau » phan cau, than cap, thanh chau
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: ho chieu sach - thanh ((chuong cham) OR (chong chay)) dung trong ban ((than cau) OR (toan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((chuong cham) or (chong chay)) dung trong ban ((than cau) OR (toan cau))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((chuong cham) or (chong chay)) dung trong ban ((than cau) OR (toan cau))*.