Perhaps you should try some spelling variations:
"language in classe series." » "language in cass series.", "language in course series.", "language in change series."
"language in case series." » "language in cass series.", "language in care series.", "language in east series."
"language in asi series." » "language in asian series.", "language in cass series.", "language in east series."

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: (((("language in asi series.") OR ("language in asia series."))) or ((("language in case series.") or ("language in classe series."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("language in asi series.") OR ("language in asia series."))) OR ((("language in case series.") OR ("language in classe series.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"language in asi series.\") OR (\"language in asia series.\"))) or (((\"language in case series.\") or (\"language in classe series.\"))))".
• Removing quotes may allow a broader search: (((( language in asi series. ) OR ( language in asia series. ))) or ((( language in case series. ) or ( language in classe series. )))).
• Adding a wildcard symbol may retrieve word variants: (((("language in asi series.") OR ("language in asia series."))) or ((("language in case series.") or ("language in classe series."))))*.