Perhaps you should try some spelling variations:
"grounded theory6" » "grounded theory", "grounded theorie", "grounded theory8.1"
"founded theory" » "grounded theory", "founding theory", "coupled theory"
"bounded theory" » "grounded theory", "blended theory", "bounds 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 ("bounded theory"))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"founded theory\") OR (\"grounded theory6\"))) or (\"bounded theory\"))*".
• Removing quotes may allow a broader search: (((( founded theory ) OR ( grounded theory6 ))) or ( bounded theory ))*.