Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thuc van » thuc vat, thuc dan, thuc hanh
hanh de » hanh ve, hanh kem
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
de cua » le cua, te cua, dieu cua
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 v ((nang xa) OR (nang x)) hoi. hieu ve cam ((thuc van) OR (thuc va)) hanh de 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 cam ((thuc van) OR (thuc va)) hanh de cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v ((nang xa) or (nang x)) hoi. hieu ve cam ((thuc van) OR (thuc va)) hanh de cua triet*.