Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
mang xa » lang xa, mang may, dang xay
sach v » sach va, sach y, sach 2
di cua » dai cua, de cua, do cua
ve cac » va cac, vien cac

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 ((mang xa) OR (nang x)) hoi. hieu ve cac thuc va hanh ((di cua) OR (doi cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v ((mang xa) or (nang x)) hoi. hieu ve cac thuc va hanh ((di cua) OR (doi cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v ((mang xa) or (nang x)) hoi. hieu ve cac thuc va hanh ((di cua) OR (doi cua)) triet*.