Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
tinh va » tich va, trinh van, trinh vat
kinh va » kinh van, sinh va, minh va
cuu tre » cua tre, cau tren, cau treo
ly hang » ly quang
ty hang » ty xang, thi hang, thu hang
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((ty hang) or (ly hang)) xa hoi. lieu va cam xuc va ((kinh va) OR (tinh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty hang) OR (ly hang)) xa hoi. lieu va cam xuc va ((kinh va) OR (tinh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((ty hang) or (ly hang)) xa hoi. lieu va cam xuc va ((kinh va) OR (tinh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty hang) or (ly hang)) xa hoi. lieu va cam xuc va ((kinh va) OR (tinh va)) cuu tre*.