Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
su sach » so sach, vu sach
van cac » van cau, van bac, dan cac
van hac » van hoc, van ha, van hai
dac ban » cac ban, dac san, duc ban
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 x ho. hieu ((van cac) or (van hac)) dac ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x ho. hieu ((van cac) OR (van hac)) dac ban thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x ho. hieu ((van cac) or (van hac)) dac ban thanh dai cua tre*.