Perhaps you should try some spelling variations:
trong chuan » thong chuan, trong thuan, trong chuong
chieu sach » chinh sach, chiet tach, chieu sang
trong chan » trong cham, trong can, trong nhan
doi chieu » doc hieu, doi chi, ho chieu
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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 - thanh ((trong chuan) or (trong chan)) trong cong dan ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - thanh ((trong chuan) OR (trong chan)) trong cong dan ((than cau) OR (than cap)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trong chuan) or (trong chan)) trong cong dan ((than cau) or (than cap))*.