Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
trung ha » trung hoc, trung tam, trung cap
trang va » tran van, hang va
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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 - thanh ((trung ha) or (trang va)) dung cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - thanh ((trung ha) OR (trang va)) dung cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((trung ha) or (trang va)) dung cong van toan ban*.