Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
trong san » trong cac, cong san, dong san
tang mau » trang mau, dang mau, thanh mau
san toan » van toan, dan toan, manh toan
toan ban » van ban
tang ma » mang may, tang 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 sach - hanh ((tang mau) or (tang ma)) dung trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh ((tang mau) OR (tang ma)) dung trong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh ((tang mau) or (tang ma)) dung trong san toan ban*.