Perhaps you should try some spelling variations:
ban hanh » ban hang
tuc ban » thuc ban, truc ban, tu ban
cuu tre » cua tre, cau tren, cau treo
tang ma » mang may, tang van
ma hoi » mai hoi, xa hoi, ma hoa
sach 7 » sach y
ve cau » ke cau, va cau, le cau
ve cac » va cac, vien cac
sach 2 » sach y
vi cuu » vi luu, vinh cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach 7) OR (sach 2)) tang ma hoi. hieu ((ve cau) OR (ve cac)) tuc ban hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach 7) OR (sach 2)) tang ma hoi. hieu ((ve cau) or (ve cac)) tuc ban hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach 7) OR (sach 2)) tang ma hoi. hieu ((ve cau) or (ve cac)) tuc ban hanh vi cuu tre*.