Perhaps you should try some spelling variations:
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
vi cua » vai cua
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hoc, o hai

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 nang ((x ho) or (o hoi)). hieu ve cam duc va hanh ((vi cua) OR (di cua)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((x ho) OR (o hoi)). hieu ve cam duc va hanh ((vi cua) OR (di cua)) cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((x ho) or (o hoi)). hieu ve cam duc va hanh ((vi cua) OR (di cua)) cu".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((x ho) or (o hoi)). hieu ve cam duc va hanh ((vi cua) OR (di cua)) cu*.