Perhaps you should try some spelling variations:
hien bach » vien bach, thien hach, dien sach
hien hanh » dieu hanh
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ca dan » ca dao
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu ((hien bach) OR (hien hanh)) tu ((ca dan) or (cac dan)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu ((hien bach) OR (hien hanh)) tu ((ca dan) OR (cac dan)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu ((hien bach) OR (hien hanh)) tu ((ca dan) or (cac dan)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu ((hien bach) OR (hien hanh)) tu ((ca dan) or (cac dan)) vi cua triet*.