Perhaps you should try some spelling variations:
"perdata telaah materi perjuangan wali sanga" » "perdata telaah dari perjuangan wali sanga", "perdata telaah seri perjuangan wali sanga", "perdata telaah strategi perjuangan wali sanga", "perdata terhadap materi perjuangan wali sanga"
"seri telaah al perjuangan wali songo" » "seri telaah dan perjuangan wali songo", "seri telaah yan perjuangan wali songo", "seri telaah 1 perjuangan wali songo", "seri teladan al perjuangan wali songo", "cerai telaah al perjuangan wali songo", "seri jelajah al perjuangan wali songo", "seri telaah qs perjuangan wali songo", "seri telaah pasal perjuangan wali songo"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("perdata telaah materi perjuangan wali sanga") or ("seri telaah al perjuangan wali songo"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("perdata telaah materi perjuangan wali sanga") OR ("seri telaah al perjuangan wali songo")).
• Removing quotes may allow a broader search: (( perdata telaah materi perjuangan wali sanga ) or ( seri telaah al perjuangan wali songo )).
• Adding a wildcard symbol may retrieve word variants: (("perdata telaah materi perjuangan wali sanga") or ("seri telaah al perjuangan wali songo"))*.