Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
me hoi » le hoi
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, va hoi
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va
va cua » va chua, via cua, ca cua
tu sac » tu sach, tu cac, tu 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: tu sac ky sang ((((ma hoi) OR (me hoi))) OR (xa hoi)). hieu van nham thuc va dan va cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((((ma hoi) or (me hoi))) or (xa hoi)). hieu van nham thuc va dan va cua tre*.