Perhaps you should try some spelling variations:
hien bach » thien hach, hien hanh, dien sach
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sac ky » cac ky, sai ky
du cua » duy cua, dau cua, dum cua
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. bieu ((hien bach) or (vien bach)) tuoc ((va danh) OR (va hanh)) du cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. bieu ((hien bach) OR (vien bach)) tuoc ((va danh) OR (va hanh)) du cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. bieu ((hien bach) or (vien bach)) tuoc ((va danh) OR (va hanh)) du cua viet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. bieu ((hien bach) or (vien bach)) tuoc ((va danh) OR (va hanh)) du cua viet*.