Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang dai » hoang dai, hang tai, hang dau
day hang » dat hang, dai hang, day nang
thuc day » thuc dan, thuc vat
vu cham » va cham, vu kham, tu cham
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
ve cham » va cham, ve chat, ve chim
sach v » sach va, sach y, sach 2

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 v ((nang xa) OR (nang x)) hoi. hieu ((ve cham) OR (vu cham)) thuc day hang dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((nang xa) or (nang x)) hoi. hieu ((ve cham) OR (vu cham)) thuc day hang dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang xa) or (nang x)) hoi. hieu ((ve cham) OR (vu cham)) thuc day hang dai cua triet*.