Perhaps you should try some spelling variations:
dinh dieu » dinh dien, dinh tieu, vinh dieu
dieu cua » dieu tra
va dinh » van dinh, va kinh, va tinh
van bac » van ban, van bao, van hac
van cac » van hac, van cau, dan cac
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
xuc va » duc va, tuc va, luc 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 y ((nang xa) OR (nang ma)) hoi. hieu ((van cac) OR (van bac)) xuc va dinh dieu cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) OR (nang ma)) hoi. hieu ((van cac) or (van bac)) xuc va dinh dieu cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) OR (nang ma)) hoi. hieu ((van cac) or (van bac)) xuc va dinh dieu cua te*.