Perhaps you should try some spelling variations:
cuu tre » cua tre, cau tren, cau treo
hanh ve » hanh vi, hanh va, hanh kem
soc van » hoc van, oc van, sac van
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
sac ky » cac ky, sai ky
anh ve » anh va, anh viet, thanh ve
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 ((nang xa) OR (nang ma)) hoi. hieu vu cham soc van ((anh ve) OR (hanh ve)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) OR (nang ma)) hoi. hieu vu cham soc van ((anh ve) or (hanh ve)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) OR (nang ma)) hoi. hieu vu cham soc van ((anh ve) or (hanh ve)) cuu tre*.