Perhaps you should try some spelling variations:
thien van » thi van
toc sach » hoc sach, doc sach, thuoc sach
van luat » dan luat, va luat, van xuat
hang tai » hang va, dung tai
xang xa » lang xa, mang xa, ang xa
tai cua » thai cua, tai cuc, tri cua
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) OR (toc sach)) ty xang xa hoi. thien van luat ((nuoc va) or (duc va)) hang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty xang xa hoi. thien van luat ((nuoc va) OR (duc va)) hang tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty xang xa hoi. thien van luat ((nuoc va) or (duc va)) hang tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty xang xa hoi. thien van luat ((nuoc va) or (duc va)) hang tai cua tre*.