Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
sach van » sach han, sach va, bach van
van nang » van quang, van ban, van dong
truc van » truc va, thuc van, truc ban
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
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: su sach van nang xa hoi. ((hieu ve) or (hieu va)) cau truc van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach van nang xa hoi. ((hieu ve) OR (hieu va)) cau truc van thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach van nang xa hoi. ((hieu ve) or (hieu va)) cau truc van thanh vi cua tre*.