Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, can thuc
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cam thu » nam thu, cac thu, ca thu
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
cua te » cua tu

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. lieu va ((cam thuc) OR (cam thu)) van hanh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang xa hoi. lieu va ((cam thuc) OR (cam thu)) van hanh vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. lieu va ((cam thuc) OR (cam thu)) van hanh vi ((cua tre) or (cua te))*.