Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
nam thuc » nam thuoc, am thuc, nam thu
thanh vi » hanh vi, thanh va, thanh ve
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, 5 hoi

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) OR (x ho)). ((hieu ve) OR (lieu va)) nam thuc va thanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach v nang ((x hoi) OR (x ho)). ((hieu ve) or (lieu va)) nam thuc va thanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach v nang ((x hoi) OR (x ho)). ((hieu ve) or (lieu va)) nam thuc va thanh vi cua tre*.