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