Perhaps you should try some spelling variations:
"groups generating random" » "groups generation random", "groups generators random", "groups operating random"
"groups generated random" » "groups generalized random", "groups general random", "groups related random"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"groups generating random\") OR (\"groups generated random\"))".
• Removing quotes may allow a broader search: (( groups generating random ) OR ( groups generated random )).
• Adding a wildcard symbol may retrieve word variants: (("groups generating random") OR ("groups generated random"))*.