Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
van hanh » van thanh, ban hanh, van anh
cau tren » cu tren, dau tren, ca tren
te sach » toc sach
xang xa » lang xa, mang xa, ang xa
qua cam » qua cham, qua cac, qua ca
cuu tre » cua tre, cau treo
y xang » ty xang
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y xang xa hoi. hieu qua cam thuc ((va dan) or (van hanh)) di ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y xang xa hoi. hieu qua cam thuc ((va dan) OR (van hanh)) di ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach y xang xa hoi. hieu qua cam thuc ((va dan) or (van hanh)) di ((cuu tre) or (cau tren))*.