Perhaps you should try some spelling variations:
trung thanh » truong thanh
thuoc sach » hoc sach, nuoc sach, thuat sach
trung hanh » trung khanh, trung anh, trong hanh
nhung cong » dung cong, thong cong, hang cong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
chu sach » cau sach, thu sach, chieu sach
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: theo ((chu sach) or (thuoc sach)) - thanh ((trung hanh) OR (trung thanh)) nhung cong sang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sach) OR (thuoc sach)) - thanh ((trung hanh) OR (trung thanh)) nhung cong sang than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu sach) or (thuoc sach)) - thanh ((trung hanh) OR (trung thanh)) nhung cong sang than cap".
• Adding a wildcard symbol may retrieve word variants: theo ((chu sach) or (thuoc sach)) - thanh ((trung hanh) OR (trung thanh)) nhung cong sang than cap*.