Perhaps you should try some spelling variations:
"grounded theories" » "grounded theorie", "bounded theories", "groundless theories"
"bounded theory" » "blended theory", "bounded theories", "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: (("grounded theory") OR ((((("bounded theory") OR ("grounded theories"))) OR ("bounds theory")))).
• Removing quotes may allow a broader search: (( grounded theory ) or ((((( bounded theory ) or ( grounded theories ))) or ( bounds theory )))).
• Adding a wildcard symbol may retrieve word variants: (("grounded theory") or ((((("bounded theory") or ("grounded theories"))) or ("bounds theory"))))*.