Perhaps you should try some spelling variations:
"grounded theories" » "grounded theorie", "groundless theories", "graded theories"
"grounded theory6" » "grounded theorie", "grounded theory8.1", "ground theory"
"bounded theories" » "bounded queries", "grounded theorie", "extended theories"
"bounded theory" » "blended theory", "boundary theory", "bounding 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: (("grounded theory") OR ((((((("bounded theory") OR ((("grounded theory6") OR ("grounded theories"))))) OR ("bounded theories"))) OR ("bounds theory")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"grounded theory\") or (((((((\"bounded theory\") or (((\"grounded theory6\") OR (\"grounded theories\"))))) or (\"bounded theories\"))) or (\"bounds theory\"))))".
• Removing quotes may allow a broader search: (( grounded theory ) or ((((((( bounded theory ) or ((( grounded theory6 ) OR ( grounded theories ))))) or ( bounded theories ))) or ( bounds theory )))).
• Adding a wildcard symbol may retrieve word variants: (("grounded theory") or ((((((("bounded theory") or ((("grounded theory6") OR ("grounded theories"))))) or ("bounded theories"))) or ("bounds theory"))))*.