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

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) OR (nam thuc)) vat dung co 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) OR (nam thuc)) vat dung co cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sac ky nang xa hoi. ((hieu ve) or (hieu va)) ((nam tu) OR (nam thuc)) vat dung co cua tre*.