Perhaps you should try some spelling variations:
"bounded theories" » "grounded theories", "bounded queries", "grounded theorie"
"founded theory" » "grounded theory", "grounded theory6", "founding theory"
"bounded theory" » "grounded theory", "blended theory", "grounded theory6"
"bounds theory" » "bands theory", "funds theory", "brands theory"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (("founded theory") OR ((((("bounded theory") OR ("bounded theories"))) OR ("bounds theory")))).
• Removing quotes may allow a broader search: (( founded theory ) or ((((( bounded theory ) or ( bounded theories ))) or ( bounds theory )))).
• Adding a wildcard symbol may retrieve word variants: (("founded theory") or ((((("bounded theory") or ("bounded theories"))) or ("bounds theory"))))*.