Searching two string at a time in the Object of emails

[luigisic]

Hello,
  with SearchMailBox is possible to search emails with some criteria.

I need to search emails that Object contains the string "ACC: " and emails that Object contains the string "CON: ".

Can i search both strings at a time?

This code

Code:

  SearchInfo.Date := 0;
  SearchInfo.Size := 0;
  SearchInfo.SearchKey := skUnseen;
  SearchInfo.Text := '';
  SearchInfoArray[0] := SearchInfo;

  SearchInfo.SearchKey := skSubject;
  SearchInfo.Text := 'ACC: ';
  SearchInfoArray[1] := SearchInfo;

  SearchInfo.SearchKey := skSubject;
  SearchInfo.Text := 'CON: ';
  SearchInfoArray[2] := SearchInfo;

  if IMAP.SearchMailBox(SearchInfoArray) then

is right?

It seems not right because I dont find the emails.
if i search only one string at a time i found the emails.

Where I'm wrong?

Thanks