Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
thuc dan » thuc hanh, hoc dan, thuc vat
su sach » so sach, vu sach
thuc va » thuc vat, thuc day
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
vi cua » vai cua, di cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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: "su sach v nang x hoi. hieu van nham ((thuc va) OR (thuc dan)) hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach v nang x hoi. hieu van nham ((thuc va) OR (thuc dan)) hanh vi cua te*.