I am looking to see if there's a formula that will search for the words "_AcrobatFamily" or "_AcrobatPro" and returns the letters after that underscore. The number of underscores before these words can vary. I can get it to work on one half of the formula...but somehow it's not working with the other half.

My formula below will return "create-fillable-pdf-forms.html" for the first example, but that's about all I can do.......HELP?! Thank you in advance!
=IF(IFERROR(SEARCH("_AcrobatPro",$O9),0),MID($O9,1 8,65),"")


Data in Column O:
ad_us_AcrobatPro_create-fillable-pdf-forms.html
ad_us_AcrobatFamily_create-pdf-web-forms-builder.html
ad_mena_ar_AcrobatPro_create-fillable-pdf-forms.html
ad_be_fr_AcrobatFamily_create-pdf-web-forms-builder.html
ad_ru_AcrobatFamily_convert-existing-forms-to-fillable-pdfs.html
ad_be_nl_AcrobatFamily_create-pdf-web-forms-builder.html
ad_ap_AcrobatPro_create-fillable-pdf-forms.html
ad_es_AcrobatFamily_convert-existing-forms-to-fillable-pdfs.html
ad_africa_AcrobatFamily_form-creator.html
ad_dk_AcrobatFamily_create-pdf-web-forms-builder.html