Perhaps you should try some spelling variations:
"single-versus reflex cameras / handbooks, manuals, etc" » "single-versus reflexive cameras / handbooks, manuals, etc", "single-versus refined cameras / handbooks, manuals, etc", "single-versus refugee cameras / handbooks, manuals, etc", "single-versus reflex camera / handbooks, manuals, etc", "single-versus reflex cameras / handbook, manuals, etc", "single-versus reflex cameras / handbooks, manual, etc"
"single-less reflex cameras / handbooks, manuals, etc" » "single-bass 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"
"single-les reflex cameras / handbooks, manuals, etc" » "single-als reflex cameras / handbooks, manuals, etc", "single-der reflex cameras / handbooks, manuals, etc", "single-lid reflex cameras / handbooks, manuals, etc", "single-les reflex camera / handbooks, manuals, etc", "single-les reflex cameras / handbook, manuals, etc", "single-les reflex cameras / handbooks, manual, etc"
"single-lens reflex cameras / handbooks, manuals, etc" » "single-lens reflex camera / handbooks, manuals, etc", "single-lens reflex cameras / handbook, manuals, etc", "single-lens reflex cameras / handbooks, manual, 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 cameras / handbooks, manuals, etc"))) OR ((("single-less reflex cameras / handbooks, manuals, etc") OR ("single-versus 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\") OR (\"single-versus 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 ) OR ( single-versus 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") OR ("single-versus reflex cameras / handbooks, manuals, etc"))))*.