Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
hien cac » thien cac, vien cac, hieu cac
nang ma » tang ma, sang ma, mang may
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
cac tuc » cac toc, cac tu, cac tac
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
su sach » so sach, vu sach
tuc va » thuc va, truc va, tuc xa
di cua » dai cua, doi cua, de cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang xa) or (((nang ma) OR (nang cao)))) hoi. hieu hien cac tuc va hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (((nang ma) OR (nang cao)))) hoi. hieu hien cac tuc va hanh di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang xa) or (((nang ma) OR (nang cao)))) hoi. hieu hien cac tuc va hanh di cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (((nang ma) OR (nang cao)))) hoi. hieu hien cac tuc va hanh di cua triet*.