Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh ve » hanh ve, thanh va, thanh vien
chat cua » nhat cua, chat va, chat huu
tu sach » thu sach, su sach, te sach
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
ly hang » ly quang
ly nang » ky nang, ly vang, ly quang
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ly nang) or (ly hang)) ((x hoi) or (x ho)). hieu va chat cua ban thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ly nang) OR (ly hang)) ((x hoi) OR (x ho)). hieu va chat cua ban thanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ly nang) or (ly hang)) ((x hoi) or (x ho)). hieu va chat cua ban thanh ve cua tre*.