Perhaps you should try some spelling variations:
"online range research documents" » "online range research arguments", "online range research comments", "online range research catchments", "online change research documents", "online range search documents", "online age research documents", "online ring research documents", "nonlinear range research documents"
"online large research documents" » "online large research arguments", "online large research comments", "online large research catchments", "online care research documents", "online change research documents", "online edge research documents", "online target research documents", "nine large research documents", "online merge research documents"
"online rand research contents" » "online rand research content", "online rand research context", "online rand research concepts", "online brand research contents", "online card research contents", "online ad research contents", "online band research contents", "online hand research contents"
"online large search document" » "online target search document", "nine large search document", "online merge search document", "online range search document", "online page search document", "online large arch document"

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("online range research documents") OR ((("online large research documents") OR ("online large search document"))))) OR ("online rand research contents")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"online range research documents\") or (((\"online large research documents\") OR (\"online large search document\"))))) or (\"online rand research contents\"))".
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• Adding a wildcard symbol may retrieve word variants: (((("online range research documents") or ((("online large research documents") OR ("online large search document"))))) or ("online rand research contents"))*.