Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
cau treo » cau theo, cau tren, cau triet
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cuu tre » cua tre, cau tren
y nang » ky nang, ly nang, v nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((hieu va) OR (hieu qua)) cach thuc van hanh vi ((cuu tre) OR (cau treo))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. ((hieu va) OR (hieu qua)) cach thuc van hanh vi ((cuu tre) or (cau treo))~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu va) OR (hieu qua)) cach thuc van hanh vi ((cuu tre) or (cau treo))*.