Perhaps you should try some spelling variations:
"und generation random" » "und generating random", "und generator random", "und generated random", "sound generation random", "und regeneration random", "3rd generation random"
"based generation rotary" » "based generation coronary", "based generation retail", "based generation return", "based integration rotary", "based genetic rotary"
"based generation radar" » "based integration radar", "based genetic radar", "based generation raman", "based generation radio", "based generation rate"

Try widening your search to All Fields.

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: (((("based generation radar") OR ("based generation rotary"))) OR ("und generation random")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"based generation radar\") OR (\"based generation rotary\"))) or (\"und generation random\"))".
• Removing quotes may allow a broader search: (((( based generation radar ) OR ( based generation rotary ))) or ( und generation random )).
• Adding a wildcard symbol may retrieve word variants: (((("based generation radar") OR ("based generation rotary"))) or ("und generation random"))*.