Perhaps you should try some spelling variations:
hoc thieu » hoc hien
cong thuc » cong tac
thuc mang » thuc trang, thuoc dang, thuat mang
mang cong » dang cong, bang cong, hang cong
cong lang » cong vang, cong luong, cong quang
lang phan » nang phan, lang thang, lang phong
phan lap » phan dau

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) or (toc thieu)) sach - thanh cong thuc mang cong lang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) sach - thanh cong thuc mang cong lang phan lap.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) sach - thanh cong thuc mang cong lang phan lap*.