Perhaps you should try some spelling variations:
"hitchin b erd." » "hitchin _ erd.", "hitchin c erd.", "hitchin n erd.", "hitchin i erd.", "hitchin 7 erd."
"hitchin 6 erd." » "hitchin _ erd.", "hitchin c erd.", "hitchin n erd.", "hitchin 6 end.", "hitchin 6 esd."
"hitchin a etc." » "hitching a etc.", "hitchin _ etc.", "hitchin c etc.", "hitchin a ete."

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: (((("hitchin b erd.") OR ("hitchin 6 erd."))) OR ("hitchin a etc.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"hitchin b erd.\") OR (\"hitchin 6 erd.\"))) or (\"hitchin a etc.\"))".
• Removing quotes may allow a broader search: (((( hitchin b erd. ) OR ( hitchin 6 erd. ))) or ( hitchin a etc. )).
• Adding a wildcard symbol may retrieve word variants: (((("hitchin b erd.") OR ("hitchin 6 erd."))) or ("hitchin a etc."))*.