Perhaps you should try some spelling variations:
luat duoc » luat tuc
hieu van » hieu va, thien van, lieu va
van luat » dan luat, va luat, van xuat
lang van » dang van, tang van, hoang van
cua tre » cua te, cua triet, dua tren
va luan » vay luan, van luan, va quan
duoc va » nuoc va, duc va, duoc ma
te sach » toc sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay
cuu tre » cau tren, cau treo

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 ky ((lang xa) or (lang van)) hoi. hieu van luat duoc va luan van ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((lang xa) OR (lang van)) hoi. hieu van luat duoc va luan van ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((lang xa) or (lang van)) hoi. hieu van luat duoc va luan van ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((lang xa) or (lang van)) hoi. hieu van luat duoc va luan van ((cua tre) OR (cuu tre))*.