Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
cua tre » cua te, cuu tre, cua triet
hai cua » thai cua, dai cua, hoi cua
soc van » hoc van, oc van, sac van
hieu ve » hieu va
mang xa » lang xa, mang may, mang cua
sac ky » cac ky, sai ky
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 ((mang xa) OR (dang xay)) hoi. ((hieu ve) OR (hieu van)) cham soc van hanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((mang xa) or (dang xay)) hoi. ((hieu ve) OR (hieu van)) cham soc van hanh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((mang xa) or (dang xay)) hoi. ((hieu ve) OR (hieu van)) cham soc van hanh hai cua tre*.