Perhaps you should try some spelling variations:
"single-less reflex cameras / handbooks, manuals, etc" » "single-bass reflex cameras / handbooks, manuals, etc", "single-versus reflex cameras / handbooks, manuals, etc", "single-loops reflex cameras / handbooks, manuals, etc", "single-less reflex camera / handbooks, manuals, etc", "single-less reflex cameras / handbook, manuals, etc", "single-less reflex cameras / handbooks, manual, etc"
les reflex » als reflex, der reflex, lid reflex

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 Cameras / Handbooks, Manuals, Etc"))) OR ("single-less reflex cameras / handbooks, manuals, etc")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Single-lens Reflex Cameras / Handbooks, Manuals, Etc\") OR (\"Single-les Reflex Cameras / Handbooks, Manuals, Etc\"))) or (\"single-less reflex cameras / handbooks, manuals, etc\"))".
• Removing quotes may allow a broader search: (((( Single-lens Reflex Cameras / Handbooks, Manuals, Etc ) OR ( Single-les Reflex Cameras / Handbooks, Manuals, Etc ))) or ( single-less reflex cameras / handbooks, manuals, etc )).
• Adding a wildcard symbol may retrieve word variants: (((("Single-lens Reflex Cameras / Handbooks, Manuals, Etc") OR ("Single-les Reflex Cameras / Handbooks, Manuals, Etc"))) or ("single-less reflex cameras / handbooks, manuals, etc"))*.