Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
truc van » truc va, thuc van, truc ban
va cham » va chat, va tham
cua tre » cua te, cuu tre, cua triet
ve chim » va chim, ve cham, ve chinh
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
y lang » o lang, _ lang, tay lang
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: toc sach y lang ((van hoi) OR (van hoe)). hieu ((ve chim) or (va cham)) truc van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y lang ((van hoi) OR (van hoe)). hieu ((ve chim) OR (va cham)) truc van thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y lang ((van hoi) OR (van hoe)). hieu ((ve chim) or (va cham)) truc van thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach y lang ((van hoi) OR (van hoe)). hieu ((ve chim) or (va cham)) truc van thanh vi cua tre*.