Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
van thanh » van tuan
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
van hoc » van hoa
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky lang van hoc. hieu ((van cam) or (van cau)) luc ((van thanh) OR (ban thanh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky lang van hoc. hieu ((van cam) OR (van cau)) luc ((van thanh) OR (ban thanh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky lang van hoc. hieu ((van cam) or (van cau)) luc ((van thanh) OR (ban thanh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu can ky lang van hoc. hieu ((van cam) or (van cau)) luc ((van thanh) OR (ban thanh)) dai cua tre*.