Perhaps you should try some spelling variations:
"single-loops reflex cameras / handbooks, manual, etc" » "single-loop reflexes cameras / handbooks, manual, etc", "single-loops refresh cameras / handbooks, manual, etc", "single-loops review cameras / handbooks, manual, etc", "single-loops reflex camera / handbooks, manual, etc"
"single-less reflex cameras / handbooks, manual, etc" » "single-bass reflex cameras / handbooks, manual, etc", "single-versus reflex cameras / handbooks, manual, etc", "single-less reflex camera / handbooks, manual, etc"
"single-lens reflex cameras / handbooks, manual, etc" » "single-les reflex cameras / handbooks, manual, etc", "single-lens reflex camera / handbooks, manual, etc"

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, manual, etc") OR ((("single-less reflex cameras / handbooks, manual, etc") OR ("single-loops reflex cameras / handbooks, manual, etc"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"single-lens reflex cameras / handbooks, manual, etc\") or (((\"single-less reflex cameras / handbooks, manual, etc\") OR (\"single-loops reflex cameras / handbooks, manual, etc\"))))*".
• Removing quotes may allow a broader search: (( single-lens reflex cameras / handbooks, manual, etc ) or ((( single-less reflex cameras / handbooks, manual, etc ) OR ( single-loops reflex cameras / handbooks, manual, etc ))))*.