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