Perhaps you should try some spelling variations:
dinh hoi » dinh moi, dinh toi, dinh hoa
su sach » so sach, vu sach
nang xa » nang x, lang xa, mang xa
hoi cua » hoi chuc
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
tuc va » thuc va, truc va, tuc xa
ve cac » va cac, vien cac
xuc va » duc va, luc va, xac va
cua te » cua tu

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 ty ((nang xa) OR (nang ma)) hoi. hieu ve cac ((xuc va) OR (tuc va)) dinh hoi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) OR (nang ma)) hoi. hieu ve cac ((xuc va) or (tuc va)) dinh hoi cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) OR (nang ma)) hoi. hieu ve cac ((xuc va) or (tuc va)) dinh hoi cua te*.