Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, xuc ban
ky sang » ky nang, ky dang, ky tang
lap hoi » lap doi, lap hai, luat hoi
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
di cua » dai cua, doi cua, de cua
vi cua » vai cua
tu sac » tu sach, tu cac, tu san
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang ((lap hoi) or (lai hoi)). hieu ve cam xuc van hanh ((vi cua) OR (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ((lap hoi) OR (lai hoi)). hieu ve cam xuc van hanh ((vi cua) OR (di cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ((lap hoi) or (lai hoi)). hieu ve cam xuc van hanh ((vi cua) OR (di cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((lap hoi) or (lai hoi)). hieu ve cam xuc van hanh ((vi cua) OR (di cua)) te*.