Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
cong chuc » cong thuc, cong cu, cong cua
chuc dung » thuc dung, thuoc dung, chuc nang
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang phan » van phan, nang phan, quang phan
phan cau » phan dau, phan cac, phan 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 dung cong vang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh cong chuc dung cong vang phan cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thanh cong chuc dung cong vang phan cau*.