Perhaps you should try some spelling variations:
so sang » so sanh, so dang, so lang
sang ky » sang kyo, dang ky, tang ky
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
dac va » duc va, dat va, dai va

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sang ky lang xa hoi. hieu ve cac ((dac va) OR (day va)) hanh kem cua tre~".
• Adding a wildcard symbol may retrieve word variants: so sang ky lang xa hoi. hieu ve cac ((dac va) OR (day va)) hanh kem cua tre*.