Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, theo sach
cang thang » cong thanh, dang thanh
hieu cach » hieu cac, chieu sach, hieu ca
thang cua » thong cua, hang cua, than cua
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
dan than » dan chan, ban than, van than
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: toc ((thieu sach) or (hieu cach)) - cang thang cua ((cong cong) or (dung cong)) dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (hieu cach)) - cang thang cua ((cong cong) OR (dung cong)) dan than cap.
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) or (hieu cach)) - cang thang cua ((cong cong) or (dung cong)) dan than cap*.