Perhaps you should try some spelling variations:
hoc thieu » hoc hien
manh tung » manh hung, thanh tung
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
dan van » dang van, doan van, dao van
do van » dao van, vo van, so van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) sach - manh tung cua dung cong ((dan van) or (do van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - manh tung cua dung cong ((dan van) OR (do van)) ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sach - manh tung cua dung cong ((dan van) or (do van)) ban*.