Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
qua cao » qua cac, qua ca, qua cai
cao duc » dao duc, cao suc, giao duc
va hanh » van hanh, va danh, ban hanh
su cac » tu cac, su cao, su can
vi cua » vai cua
di cua » dai cua, doi cua, de 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 cac ky nang x hoi. hieu qua cao duc ((va hanh) OR (va thanh)) ((vi cua) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang x hoi. hieu qua cao duc ((va hanh) OR (va thanh)) ((vi cua) OR (di cua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang x hoi. hieu qua cao duc ((va hanh) OR (va thanh)) ((vi cua) or (di cua)) triet*".