Perhaps you should try some spelling variations:
dung thai » duong thai, dung tai, dung hai
hieu van » hieu va, thien van, lieu va
thuc xay » thuc day, tuc xay, thuat xay
thai cua » than cua, tai cuc, tri cua
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang xa hoi. hieu van nam ((thuc xay) or (thuc va)) dung thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang xa hoi. hieu van nam ((thuc xay) OR (thuc va)) dung thai cua tre.
• Adding a wildcard symbol may retrieve word variants: su cac ky nang xa hoi. hieu van nam ((thuc xay) or (thuc va)) dung thai cua tre*.