Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
thuc dan » thuc hanh, hoc dan, thuc vat
thanh vi » thanh va, thanh ve, nhanh vi
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cua tre » cuu tre, cua triet, dua tren
so sac » so sach, so dac
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang xa hoi. hieu qua cac thuc dan ((thanh vi) or (hanh vi)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang xa hoi. hieu qua cac thuc dan ((thanh vi) OR (hanh vi)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: so sac ky nang xa hoi. hieu qua cac thuc dan ((thanh vi) or (hanh vi)) ((cua tre) or (cua te))*.