Perhaps you should try some spelling variations:
"_ corporate technical report series" » "_ corpora technical report series", "_ corporate ethical report series", "_ corporate techno report series"
"_ corporate technical report server" » "_ corpora technical report server", "_ corporate ethical report server", "_ corporate techno report server"
"_ corporation ethical report series" » "_ corporations ethical report series", "_ corporation ethics report series", "_ corporations ethically report series", "_ corporation ethical robot series", "_ corporation ethical root series", "_ corporation technical reports series"
"_ corporation medical report series" » "_ corporation america report series", "_ corporation fedoral report series", "_ corporation critical report series", "_ corporation medical reports series", "_ corporation medical record series", "_ corporation medical records series"

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: (((("_ corporate technical report series") OR ("_ corporate technical report server"))) OR ((("_ corporation ethical report series") OR ("_ corporation medical report series")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"_ corporate technical report series\") OR (\"_ corporate technical report server\"))) or (((\"_ corporation ethical report series\") or (\"_ corporation medical report series\"))))".
• Removing quotes may allow a broader search: (((( _ corporate technical report series ) OR ( _ corporate technical report server ))) or ((( _ corporation ethical report series ) or ( _ corporation medical report series )))).
• Adding a wildcard symbol may retrieve word variants: (((("_ corporate technical report series") OR ("_ corporate technical report server"))) or ((("_ corporation ethical report series") or ("_ corporation medical report series"))))*.