Perhaps you should try some spelling variations:
chai xuc » chat xuc, cam xuc, chao xu
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
va chai » va cai, va chat, va cham
mai hoi » mai khoi, dai hoi, lai hoi
tai ky » thai ky, trai ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
xuc va » duc va, tuc va, luc va
vi cau » ve cau, di cau, viet cau
va cau » van cau, va cac, va dau
su tai » su thi, tu tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su tai ky nang ((ma hoi) or (mai hoi)). hieu va chai xuc va hanh ((vi cau) OR (va cau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su tai ky nang ((ma hoi) OR (mai hoi)). hieu va chai xuc va hanh ((vi cau) OR (va cau)) treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su tai ky nang ((ma hoi) or (mai hoi)). hieu va chai xuc va hanh ((vi cau) OR (va cau)) treo".
• Adding a wildcard symbol may retrieve word variants: su tai ky nang ((ma hoi) or (mai hoi)). hieu va chai xuc va hanh ((vi cau) OR (va cau)) treo*.