Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cach manh » cach mang, cach nhanh, sach danh
nang cong » nang song, dang cong, bang cong
hoang van » hang va
manh cua » doanh cua, ban cua
cua nang » chua nang, cua dang, cua hang
lang van » dang van, tang van, giang 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 - cach manh cua nang cong ((lang van) or (hoang van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sach - cach manh cua nang cong ((lang van) OR (hoang van)) ban*.