Perhaps you should try some spelling variations:
su sach » so sach, vu sach
dinh du » dinh duc, dinh cu, dinh tu
dinh di » dinh vi, danh di, dinh da
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
tang ma » tang van
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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: su sach ky ((tang ma) OR (mang may)) hoi. hieu ve cam xuc van ((dinh di) OR (dinh du)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((tang ma) or (mang may)) hoi. hieu ve cam xuc van ((dinh di) OR (dinh du)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((tang ma) or (mang may)) hoi. hieu ve cam xuc van ((dinh di) OR (dinh du)) cuu tre*.