Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh di » thanh doi, thanh de, thanh do
thuc van » thuc vat, thuc dan, thuc va
dau thuc » dan thuc, dai thuc, dam thuc
su sach » vu sach
ly nang » ky nang, ly hang, ly vang
so sach » so sanh, bo sach, co sach
cuu tre » cua tre, cau tren, cau treo
va dau » va dao
di cuu » di cau, di cua, dinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) OR (so sach)) ((ly nang) or (ty xang)) xa hoi. lieu va dau thuc van thanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ((ly nang) OR (ty xang)) xa hoi. lieu va dau thuc van thanh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ((ly nang) or (ty xang)) xa hoi. lieu va dau thuc van thanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ((ly nang) or (ty xang)) xa hoi. lieu va dau thuc van thanh di cuu tre*.