Perhaps you should try some spelling variations:
"perdata telaah dan perjuangan wali songo" » "perdata terhadap dan perjuangan wali songo", "perdata telaah dan perkembangan wali songo", "perdata teladan dan perjuangan wali songo", "perdata telaah al perjuangan wali songo", "perdata telaah ulang perjuangan wali songo"
"perdata telaah dan keuangan wali songo" » "perdata terhadap dan keuangan wali songo", "perdata telaah dan keuangan dari songo", "perdata telaah dan keuangan al songo", "perdata telaah dan keuangan jilid songo", "perdata teladan dan keuangan wali songo", "perdata telaah al keuangan wali songo", "perdata telaah ulang keuangan wali songo"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("perdata telaah dan perjuangan wali songo") OR ("perdata telaah dan keuangan wali songo"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"perdata telaah dan perjuangan wali songo\") OR (\"perdata telaah dan keuangan wali songo\"))".
• Removing quotes may allow a broader search: (( perdata telaah dan perjuangan wali songo ) OR ( perdata telaah dan keuangan wali songo )).
• Adding a wildcard symbol may retrieve word variants: (("perdata telaah dan perjuangan wali songo") OR ("perdata telaah dan keuangan wali songo"))*.