Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
lai hoi » dai hoi, lai hoa, lai roi
va hanh » van hanh, va thanh, va danh
hieu vu » hieu va, hieu ve, hieu su
vu chat » va chat, ve chat, du chat
tu san » thu san, tu ban, tu can
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ((ky tang) OR (ky dang)) ((lai hoi) or (dai hoc)). hieu vu chat luc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky tang) OR (ky dang)) ((lai hoi) OR (dai hoc)). hieu vu chat luc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky tang) OR (ky dang)) ((lai hoi) or (dai hoc)). hieu vu chat luc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky tang) OR (ky dang)) ((lai hoi) or (dai hoc)). hieu vu chat luc va hanh vi cua te*.