Perhaps you should try some spelling variations:
dung cua » dung luan, dung cho
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
dung co » dung cho, dung cong
so sac » so sach, so dac
tu vat » tu va, tu van, tu bat
sac ky » cac ky, sai ky
nam tu » nam thu, nam thuc

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: so sac ky nang xa hoi. ((hieu ve) OR (hieu va)) nam tu vat ((dung co) OR (dung cua)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky nang xa hoi. ((hieu ve) or (hieu va)) nam tu vat ((dung co) OR (dung cua)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sac ky nang xa hoi. ((hieu ve) or (hieu va)) nam tu vat ((dung co) OR (dung cua)) cua tre*.