Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
thanh le » thinh le, thanh ve, thanh liem
hieu van » hieu va, thien van, lieu va
te sach » toc sach
luu van » cuu van, luan van, luu hanh
hau luu » hat luu, phap luu
nang xa » lang xa, nang ma, mang xa
van hau » van ha, van hai, van dau
cua tre » cua te, cuu tre, cua triet

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