Perhaps you should try some spelling variations:
thien van » thi van
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, lieu va, hieu ve
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
cam luc » cam xuc, cau luc
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc 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 (ty hang)) xa hoi. ((hieu van) or (thien van)) cam luc va tinh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty nang) OR (ty hang)) xa hoi. ((hieu van) OR (thien van)) cam luc va tinh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty nang) or (ty hang)) xa hoi. ((hieu van) or (thien van)) cam luc va tinh va cuu tre*.