Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cac duc » cac du, cao duc, cac dac
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
vi cua » vai cua, di 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 sac ky nang xa hoi. ((hieu va) OR (hieu qua)) cac duc ((ban hanh) or (van minh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. ((hieu va) OR (hieu qua)) cac duc ((ban hanh) OR (van minh)) vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((hieu va) OR (hieu qua)) cac duc ((ban hanh) or (van minh)) vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang xa hoi. ((hieu va) OR (hieu qua)) cac duc ((ban hanh) or (van minh)) vi cua triet*.