Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
dang hai » dang khai, hang hai, dung hai
danh hai » lanh hai, manh hai, danh hau
luat tuc » luat thue
hieu van » hieu va, thien van, lieu va
van luat » dan luat, va luat, van xuat
ty tang » tay tang, ty hang, ky tang
su sach » so sach, vu sach
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa

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 ((ty tang) or (ty xang)) ma hoi. hieu van luat tuc va ((danh hai) OR (dang hai)) cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty tang) OR (ty xang)) ma hoi. hieu van luat tuc va ((danh hai) OR (dang hai)) cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty tang) or (ty xang)) ma hoi. hieu van luat tuc va ((danh hai) OR (dang hai)) cau treo".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty tang) or (ty xang)) ma hoi. hieu van luat tuc va ((danh hai) OR (dang hai)) cau treo*.