Perhaps you should try some spelling variations:
"single-less reflex cameras / handbook, manuals, etc" » "single-bass reflex cameras / handbook, manuals, etc", "single-versus reflex cameras / handbook, manuals, etc", "single-loops reflex cameras / handbook, manuals, etc"
"single-lens reflex cameras / handbook, manuals, etc" » "single-les reflex cameras / handbook, manuals, etc"

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: (("single-lens reflex cameras / handbook, manuals, etc") OR ("single-less reflex cameras / handbook, manuals, etc")).
• Removing quotes may allow a broader search: (( single-lens reflex cameras / handbook, manuals, etc ) or ( single-less reflex cameras / handbook, manuals, etc )).
• Adding a wildcard symbol may retrieve word variants: (("single-lens reflex cameras / handbook, manuals, etc") or ("single-less reflex cameras / handbook, manuals, etc"))*.