Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
su sach » so sach, vu sach
ly nang » ky nang, ly vang, ly quang
ly hang » ly quang
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
tai cua » thai cua, tai cuc, dai cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ly nang) or (ly hang)) x hoi. lieu va cac duc ban thanh ((tai cua) OR (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ly nang) OR (ly hang)) x hoi. lieu va cac duc ban thanh ((tai cua) OR (tri cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ly nang) or (ly hang)) x hoi. lieu va cac duc ban thanh ((tai cua) OR (tri cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ly nang) or (ly hang)) x hoi. lieu va cac duc ban thanh ((tai cua) OR (tri cua)) tre*.