Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
cam tuc » cam xuc, cam tu, dam thuc
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
te sac » te sach, te cac, te san

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: te sac ky dang xa hoi. ((lieu va) OR (hieu qua)) ((cam tuc) OR (nam thuc)) va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang xa hoi. ((lieu va) or (hieu qua)) ((cam tuc) OR (nam thuc)) va thanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky dang xa hoi. ((lieu va) or (hieu qua)) ((cam tuc) OR (nam thuc)) va thanh vi cua tre*.