Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
cong chuc » cong thuc, cong cu, cong cua
chuc dang » chuc nang, chuc danh, thuoc dang
dang dung » dan dung, dang hung, dang quang
dung cong » dung trong
cong khan » cong khanh, cong nhan, cong phan
khan tu » phan tu, han tu, than tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) sach - thanh cong chuc dang dung cong khan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh cong chuc dang dung cong khan tu.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thanh cong chuc dang dung cong khan tu*.