Perhaps you should try some spelling variations:
"single-less reflex cameras / handbooks, manual, etc" » "single-bass reflex cameras / handbooks, manual, etc", "single-versus reflex cameras / handbooks, manual, etc", "single-loops reflex cameras / handbooks, manual, etc", "single-less reflex camera / handbooks, manual, etc"
"single- les reflex or der reflex cameras / handbooks, manuals, etc" » "single- als reflex or der reflex cameras / handbooks, manuals, etc", "single- lid reflex or der reflex cameras / handbooks, manuals, etc", "single- plates reflex or der reflex cameras / handbooks, manuals, etc", "single- les reflex or der reflexion cameras / handbooks, manuals, etc", "single- les reflex or der reflex camera / handbooks, manuals, etc"
"single-lens reflex cameras / handbooks, manuals, etc" » "single-lens reflex camera / handbooks, 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 / handbooks, manuals, etc") OR ("single-((les reflex) or (der reflex)) cameras / handbooks, manuals, etc"))) OR ("single-less reflex cameras / handbooks, manual, etc")).
• Removing quotes may allow a broader search: (((( single-lens reflex cameras / handbooks, manuals, etc ) or ( single-((les reflex) or (der reflex)) cameras / handbooks, manuals, etc ))) or ( single-less reflex cameras / handbooks, manual, etc )).
• Adding a wildcard symbol may retrieve word variants: (((("single-lens reflex cameras / handbooks, manuals, etc") or ("single-((les reflex) or (der reflex)) cameras / handbooks, manuals, etc"))) or ("single-less reflex cameras / handbooks, manual, etc"))*.