Perhaps you should try some spelling variations:
hang dien » quang dien, dang dieu, nhan dien
hoc sach » hoc sinh, hoc cac, hoc anh
dien cua » dieu cua, dien cuc, dien cu
lieu van » lieu va, hieu van, sieu van
van tham » van thanh, van tuan, van chat
va nang » van nang, da nang, cam nang
vu nang » vuc nang, vu dang, v nang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, duc va

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 ((vu nang) or (va nang)) xa hoi. lieu van tham ((tuc va) OR (tuc xa)) hang dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((vu nang) OR (va nang)) xa hoi. lieu van tham ((tuc va) OR (tuc xa)) hang dien cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ((vu nang) or (va nang)) xa hoi. lieu van tham ((tuc va) OR (tuc xa)) hang dien cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ((vu nang) or (va nang)) xa hoi. lieu van tham ((tuc va) OR (tuc xa)) hang dien cua tre*.