Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, lang van
van cac » van hac, van cau, van bac
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh

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: tu sach ky ((nang xa) OR (((lang xa) OR (dang xay)))) hoi. hieu van cac duc va hanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) or (((lang xa) OR (dang xay)))) hoi. hieu van cac duc va hanh dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (((lang xa) OR (dang xay)))) hoi. hieu van cac duc va hanh dai cua triet*.