Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
qua than » qua thanh, qua phan, qua tan
thanh vi » hanh vi, thanh va, thanh ve
ky tang » ky dang, kho tang, ky trong
hoa hoi » khoa hoi, hoa hoc, hoa doi
qua cac » cua cac
soc ban » hoc ban, coc ban, so ban
cua tre » cua te, cuu tre, cua triet
te cac » tu cac, ve cac, te cao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ((ky tang) OR (ky nang)) hoa hoi. hieu ((qua cac) or (qua than)) soc ban thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ((ky tang) OR (ky nang)) hoa hoi. hieu ((qua cac) OR (qua than)) soc ban thanh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ((ky tang) OR (ky nang)) hoa hoi. hieu ((qua cac) or (qua than)) soc ban thanh vi cua tre*".