Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
tang tai » dung tai, sang tao, dong tai
hang tai » hang va, dung tai
cua tre » cua te, cuu tre, cua triet
dinh vi » dinh ve, dinh viet, dinh tri
va dinh » van dinh, va kinh, va tinh
ve chat » va chat, van chat
sai ky » sac ky
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
vu sai » vu hai, vu san, vu dai

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: vu sai ky ((tang tai) OR (hang tai)) khoa. hieu ((ve chat) OR (vien cac)) xuc va dinh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sai ky ((tang tai) OR (hang tai)) khoa. hieu ((ve chat) or (vien cac)) xuc va dinh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sai ky ((tang tai) OR (hang tai)) khoa. hieu ((ve chat) or (vien cac)) xuc va dinh vi cua tre*.