Perhaps you should try some spelling variations:
thien van » thi van
thanh vai » thanh hai, thanh van, thanh tai
tu sach » thu sach, su sach, te sach
van hac » van hoc, van ha, van hai
dac ban » cac ban, dac san, da ban
duc ban » duc tan, duc van, dua ban
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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: tu sach y nang x hoi. thien van hac ((dac ban) or (duc ban)) thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. thien van hac ((dac ban) OR (duc ban)) thanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. thien van hac ((dac ban) or (duc ban)) thanh vai cua tre*.