Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
van chat » cao chat
hieu van » hieu va, thien van, lieu va
xuc van » duc van, luc van, vuc van
lang xa » lang ha, dang xay, lang van
sach ky » sach y, sach ty, sach kem
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
vi cua » vai cua, di cua

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 ((sach ky) OR (sac ky)) ((nang xa) OR (lang xa)) hoi. hieu van chat xuc van hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sac ky)) ((nang xa) or (lang xa)) hoi. hieu van chat xuc van hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sac ky)) ((nang xa) or (lang xa)) hoi. hieu van chat xuc van hanh vi cua tre*.