Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
trong tinh » truong tinh, trong kinh, trong sinh
cong thai » cong hai, hong thai, cong thanh
thai lua » thai luan, thai luat, thai cua
lua dung » qua dung, luan hung, qua duong
tinh phi » tinh phu, kinh phi, linh phi
phi phi » chi phi, phi thi, thi phi

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) or (chieu tinh)) - cong thai lua dung trong tinh phi phi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu tinh)) - cong thai lua dung trong tinh phi phi.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chieu tinh)) - cong thai lua dung trong tinh phi phi*.