Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
vu sach » vu bach, su sach, vu khach
hanh di » hanh vi, hanh de, hang di
thuc va » thuc vat, thuc day
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
hieu va » lieu va, hieu qua
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 sach v nang x hoi. ((hieu ve) OR (hieu va)) nam ((thuc va) OR (thuc dan)) hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: vu sach v nang x hoi. ((hieu ve) or (hieu va)) nam ((thuc va) or (thuc dan)) hanh di cua tre*.