Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
anh tang » anh bang, anh nang, anh sang
anh dang » anh dong, anh dung, anh bang
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
va dang » van dang, va nang, va lang

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 sach - ((anh tang) or (anh dang)) va dang cong ((dan than) or (dan chan)) man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((anh tang) OR (anh dang)) va dang cong ((dan than) OR (dan chan)) man.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((anh tang) or (anh dang)) va dang cong ((dan than) or (dan chan)) man*.