Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cdung luan » chung luan, dung quan, cong luan
cong duong » cuong duong, cong dong, con duong
duong dan » duong dang, huong dan, duong van
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 - thanh ((dung luan) or (cdung luan)) cong duong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - thanh ((dung luan) OR (cdung luan)) cong duong dan than cap*.