Perhaps you should try some spelling variations:
"digital conservation -- handbook, manuals, etc." » "digital cooperation -- handbook, manuals, etc.", "heritage conservation -- handbook, manuals, etc.", "sites conservation -- handbook, manuals, etc."
"animal conservation -- handbook, manuals, etc." » "language conservation -- handbook, manuals, etc."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("digital preservation -- handbook, manuals, etc.") or ((("digital conservation -- handbook, manuals, etc.") OR ("animal conservation -- handbook, manuals, etc."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("digital preservation -- handbook, manuals, etc.") OR ((("digital conservation -- handbook, manuals, etc.") OR ("animal conservation -- handbook, manuals, etc.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"digital preservation -- handbook, manuals, etc.\") or (((\"digital conservation -- handbook, manuals, etc.\") OR (\"animal conservation -- handbook, manuals, etc.\"))))".
• Removing quotes may allow a broader search: (( digital preservation -- handbook, manuals, etc. ) or ((( digital conservation -- handbook, manuals, etc. ) OR ( animal conservation -- handbook, manuals, etc. )))).
• Adding a wildcard symbol may retrieve word variants: (("digital preservation -- handbook, manuals, etc.") or ((("digital conservation -- handbook, manuals, etc.") OR ("animal conservation -- handbook, manuals, etc."))))*.

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