Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
van luong » van duong, van cuong, nang luong
thong dan » thong van, tuong dan, thong den
minh dan » minh danh, minh doan, binh dan
cong dan » cong san, cong tan, huong dan
than cap » khan cap, thanh lap, thanh cac
dan van » dang van, doan van, dao 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 - minh dan van luong ((cong dan) OR (thong dan)) than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sach - minh dan van luong ((cong dan) OR (thong dan)) than cap*".