Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
va cham » va chat, va tham
vai cua » dai cua, hai cua, lai cua
tuc van » thuc van, truc van, tuc va
cua tre » cua te, cuu tre, cua triet
ve chat » va chat, van chat
van hoc » van hoa
van hoi » van hoa, van hoe, van loi
y lang » o lang, _ lang, tay lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y lang ((van hoi) OR (van hoc)). hieu ((ve chat) or (va cham)) tuc van thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang ((van hoi) OR (van hoc)). hieu ((ve chat) OR (va cham)) tuc van thanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y lang ((van hoi) OR (van hoc)). hieu ((ve chat) or (va cham)) tuc van thanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y lang ((van hoi) OR (van hoc)). hieu ((ve chat) or (va cham)) tuc van thanh vai cua tre*.