how can i distinguish the multi-level heading?

i want to find all of the multi-level heading in the document, but it is difficult for me to finding the diff between some headings. 

look the below picture, the heading 1("Head1_M") has applyed multi-level style, and the heading 2("head2") has set to none.

i want to get heading 1 but exclude the heading 2, how can i do it?

develop use word2010.  thanks.