Perhaps you should try some spelling variations:
phong thuc » phuong thuc, phong tuc, phong thuy
thuc dung » thuoc dung, thuy dung, tuc dung
dung cong » dung trong
cong nang » cong ngang, cong lang, cong nong
nang phan » nang phat, nang thanh, nang quan
ho chieu » theo chieu, hoc thieu, mot chieu
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: ((ho chieu) or (toc thieu)) sach - khanh phong thuc dung cong nang phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (toc thieu)) sach - khanh phong thuc dung cong nang phan dau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) sach - khanh phong thuc dung cong nang phan dau*.