Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
trong sang » trong dang, trong tang, thong sang
trong san » trong cac, cong san, dong san
ho chieu » theo chieu, hoc thieu, doi chieu
tung cua » trung cua, tuong cua, dung cua
phan cau » phan dau, phan cac, phan lap

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 - thanh tung cua cong ((trong san) or (trong sang)) ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung cua cong ((trong san) OR (trong sang)) ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung cua cong ((trong san) or (trong sang)) ((phan cau) or (phan tu))*.