Perhaps you should try some spelling variations:
luat duoc » luat tuc
thanh va » thanh van, thanh ha, thanh ve
trang xa » trang va, trang ha, trong xa
hieu van » hieu va, thien van, lieu va
van luat » dan luat, va luat, van xuat
duoc va » nuoc va, duc va, duoc ma
hanh va » hang va, hanh vi
su sach » so sach, vu sach
tang xa » tang ma, lang xa, tang ha
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: su sach y ((tang xa) or (trang xa)) hoi. hieu van luat duoc va ((thanh va) OR (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((tang xa) OR (trang xa)) hoi. hieu van luat duoc va ((thanh va) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((tang xa) or (trang xa)) hoi. hieu van luat duoc va ((thanh va) OR (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((tang xa) or (trang xa)) hoi. hieu van luat duoc va ((thanh va) OR (hanh va)) cua tre*.