Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
ty nang » ty xang, ly nang, ty nong
ty hang » ly hang, ty xang, thi hang
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
va tinh » may tinh
tinh va » tich va, trinh van, trinh vat
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, luc va
va cuu » va cau, va chu, va huu

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 nang) or (ky nang))) or (ty hang)) xa hoi. hieu van cau xuc va tinh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((((ty nang) OR (ky nang))) OR (ty hang)) xa hoi. hieu van cau xuc va tinh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((((ty nang) or (ky nang))) or (ty hang)) xa hoi. hieu van cau xuc va tinh va cuu tre*.