Perhaps you should try some spelling variations:
thanh tung » thanh cong
cong sang » cong san, cong lang, cong vang
sang than » cang thang, dang thanh, sang tao
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
can bang » cao bang, van ban, von bang
than cap » khan cap, thanh lap, thanh cac
cap han » cap phan, cap can, cap hay
can ban » van ban, toan ban

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 - thanh tung ((cap han) or (((can bang) or (can ban)))) cong sang than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - thanh tung ((cap han) OR (((can bang) OR (can ban)))) cong sang than cap.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - thanh tung ((cap han) or (((can bang) or (can ban)))) cong sang than cap*.