[Anonymous]

This is the condition I built using QWP 5.6 for SharePoint 2010 and it works for me.

<FormComponentBehavior>

  <Component Type="Field" ID="First Name">

    <HideWhen>

      <Or>

        <Contains>

          <FieldRef Name="Title" />

          <Value Type="Text">123</Value>

        </Contains>

        <Contains>

          <FieldRef Name="Title" />

          <Value Type="Text">abc</Value>

        </Contains>

      </Or>

    </HideWhen>

  </Component>

</FormComponentBehavior>