Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hieu van » hieu va, thien van, lieu va
thanh le » thinh le, thanh ve, thanh de
toc sach » hoc sach, doc sach, thuoc sach
luu van » cuu van, luan van, luu hanh
cua tre » cua te, cuu tre, cua triet
nang xa » lang xa, nang ma, mang xa
van ha » van hoa, van chat, van hanh
ha luu » hat luu, ta luu, phap luu
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) y ((nang xa) or (nang x)) hoi. hieu van ha luu van thanh le cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y ((nang xa) OR (nang x)) hoi. hieu van ha luu van thanh le cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y ((nang xa) or (nang x)) hoi. hieu van ha luu van thanh le cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y ((nang xa) or (nang x)) hoi. hieu van ha luu van thanh le cua tre*.