Perhaps you should try some spelling variations:
hoc thieu » hoc hien
cong chuc » cong thuc, cong cu, cong cua
chuc dung » thuc dung, thuoc dung, chuc nang
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
lang phan » nang phan, lang thang, lang phong
phan dau » phan tu, hang dau

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

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