Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc manh
duc ban » duc tan, dua ban, duc man
van cau » van dau, van hau, van chat
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. hieu van cau ((duc ban) or (duc van)) ((thanh vai) or (thanh toan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu van cau ((duc ban) OR (duc van)) ((thanh vai) OR (thanh toan)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu van cau ((duc ban) or (duc van)) ((thanh vai) or (thanh toan)) cua tre*.