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
cho dung » cho dong, cho ung, cao dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 tung) or (thanh cong))) or (thanh trung)) cho dung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - ((((thanh tung) OR (thanh cong))) OR (thanh trung)) cho dung cong tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - ((((thanh tung) or (thanh cong))) or (thanh trung)) cho dung cong tan toan ban*.