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

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

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