Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
ly quang » le quang, vu quang
thanh di » thanh doi, thanh de, thanh do
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
ve cac » va cac, vien cac
di cua » dai cua, doi cua, de cua
cua cu » cua chu, cua cau, cua su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((ty nang) OR (ly quang)) xa hoi. hieu ve cac duc ban thanh di cua cu~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((ty nang) or (ly quang)) xa hoi. hieu ve cac duc ban thanh di cua cu*.