Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh cha » thanh ha, thanh nha, thanh phan
van nang » van quang, van ban, van dong
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
van cau » van dau, van hau, van chat
cau tuc » cau truc, cau tu, cau luc
tuc ban » thuc ban, truc ban, tu ban
cha cua » chat cua, cha chua, ca cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

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 ((y nang) or (van nang)) xa hoi. hieu van cau tuc ban thanh cha cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (van nang)) xa hoi. hieu van cau tuc ban thanh cha cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) or (van nang)) xa hoi. hieu van cau tuc ban thanh cha cua tre*.