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