Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
canh manh » lanh manh, canh tranh, cach mang
dang cong » dung cong
hoang van » hang va
manh cua » doanh cua, ban cua
cua dang » cua cong, cua ban
nang van » dang van, tang van, lang van

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 - canh manh cua dang cong ((nang van) or (hoang van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - canh manh cua dang cong ((nang van) OR (hoang van)) ban*.