Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
thanh vi » hanh vi, thanh va, thanh ve
truc van » truc va, thuc van, truc ban
ve chinh » te chinh, va chinh, che chinh
lang van » dang van, tang van, hoang van
ve chim » va chim, ve cham, te chiem
va cham » va chat, va tham
van hoi » van hoa, van hoc, van hoe
cua tre » cua te, cuu tre, cua triet
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: hoc sach y lang van hoi. hieu ((((ve chim) or (ve chinh))) or (va cham)) truc van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y lang van hoi. hieu ((((ve chim) OR (ve chinh))) OR (va cham)) truc van thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach y lang van hoi. hieu ((((ve chim) or (ve chinh))) or (va cham)) truc van thanh vi cua tre*.