Perhaps you should try some spelling variations:
thien van » thi van
su sach » so sach, vu sach
hanh di » hanh vi, hanh de, hang di
thuc va » thuc vat, thuc dan, thuc day
van bac » van ban, van bao, van hac
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
tuc va » truc va, tuc xa, duc va
di cua » dai cua, doi cua, de cua

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: ((su sach) OR (so sanh)) v nang xa hoi. thien van bac ((tuc va) OR (thuc va)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sanh)) v nang xa hoi. thien van bac ((tuc va) OR (thuc va)) hanh di cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) v nang xa hoi. thien van bac ((tuc va) OR (thuc va)) hanh di cua tre*.