Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh mang
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan tap » toan ban
cho chu » cho thue
tang va » trang va, tang van, thang va
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((cho chu) or (hoc thieu)) sach - hanh tang va dung ((cong tan) OR (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((cho chu) OR (hoc thieu)) sach - hanh tang va dung ((cong tan) OR (cong san)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((cho chu) or (hoc thieu)) sach - hanh tang va dung ((cong tan) OR (cong san)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ((cho chu) or (hoc thieu)) sach - hanh tang va dung ((cong tan) OR (cong san)) toan tap*.