Perhaps you should try some spelling variations:
luat duoc » luat tuc
doc sach » hoc sach, toc sach, nuoc sach
van nang » van quang, van ban, van dong
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
van luat » dan luat, va luat, van xuat
cua tre » cuu tre, cua triet, dua tren
va nang » da nang, cam nang, kha nang
xay hoi » xa hoi, tay hoi, cay phoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach _ dang xay hoi. hieu van luat duoc ((va nang) or (van nang)) va ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach _ dang xay hoi. hieu van luat duoc ((va nang) OR (van nang)) va ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: doc sach _ dang xay hoi. hieu van luat duoc ((va nang) or (van nang)) va ((cua tre) or (cua te))*.