Perhaps you should try some spelling variations:
luat duoc » luat tuc
thanh ve » hanh ve, thanh va, thanh vien
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
duoc va » nuoc va, duc va, duoc ma
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
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 ty lang xa hoi. ((hieu van) OR (hieu va)) luat duoc va ((thanh ve) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty lang xa hoi. ((hieu van) OR (hieu va)) luat duoc va ((thanh ve) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty lang xa hoi. ((hieu van) OR (hieu va)) luat duoc va ((thanh ve) or (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty lang xa hoi. ((hieu van) OR (hieu va)) luat duoc va ((thanh ve) or (hanh vi)) cua tre*.