Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
dap thuc » dan thuc, dai thuc, dam thuc
mai hoi » dai hoi, lai hoi, mai doi
thuc xa » thuc xay, tuc xa, thuc va
xa hanh » xa thanh, xa khanh, va hanh
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
va dap » va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang ((mai hoi) OR (mai khoi)). lieu va dap thuc xa hanh ((tai cuc) or (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang ((mai hoi) OR (mai khoi)). lieu va dap thuc xa hanh ((tai cuc) OR (tri cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang ((mai hoi) OR (mai khoi)). lieu va dap thuc xa hanh ((tai cuc) or (tri cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang ((mai hoi) OR (mai khoi)). lieu va dap thuc xa hanh ((tai cuc) or (tri cua)) tre*.