Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thanh va » thanh van, hanh va, thanh ha
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van cau
thuc va » thuc vat, thuc dan, thuc day
cua tre » cuu tre, cua triet, dua tren
xuc va » duc va, tuc va, luc va
cua te » cua tu

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 _ lang xa hoi. hieu van cam ((xuc va) OR (thuc va)) thanh va ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach _ lang xa hoi. hieu van cam ((xuc va) or (thuc va)) thanh va ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sach _ lang xa hoi. hieu van cam ((xuc va) or (thuc va)) thanh va ((cua tre) OR (cua te))*.