Can I use broad match modifier with other match types?
No, the broad match modifier feature only works when used with broad match keywords. Putting a plus symbol (+) in phrase match or exact match keywords (e.g. "+tennis +shoes" or [+tennis +shoes] ) will not change their matching behavior.
In addition, putting a plus symbol (+) in front of the brackets or quotes around a phrase match or exact match keyword (e.g. +[tennis shoes] or +"tennis shoes") will treat the keyword as a broad match keyword, where the brackets and quotation marks are part of the term.