Perhaps you should try some spelling variations:
cac thuc » cach thuc, can thuc, cay thuc
day dang » da dang, dai dang, day dan
hieu ve » hieu va, hieu van
cac thu » cach thuc, cac thoi
dang do » nang doc, dang duc, dung doi
cua tre » cua te, cuu tre, cua triet
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
do cua » doi cua, co cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang x hoi. hieu ve ((cac thuc) or (cac thu)) day dang do cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang x hoi. hieu ve ((cac thuc) OR (cac thu)) day dang do cua tre*.