Perhaps you should try some spelling variations:
"grounded theory6" » "grounded theorie", "grounded theory8.1", "grounded theories"
"bounded theories" » "grounded theories", "bounded queries", "grounded theorie"
"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 ((((("grounded theory6") OR ("bounded theories"))) OR ("bounds theory")))).
• Removing quotes may allow a broader search: (( grounded theory ) or ((((( grounded theory6 ) or ( bounded theories ))) or ( bounds theory )))).
• Adding a wildcard symbol may retrieve word variants: (("grounded theory") or ((((("grounded theory6") or ("bounded theories"))) or ("bounds theory"))))*.