Perhaps you should try some spelling variations:
"improving bank performance review." » "improving bank performance risk.", "improving bank performance evidence.", "improving market performance review.", "improving _ performance review.", "improving firm performance review.", "improving land performance review.", "improving urban performance review.", "improving basic performance review."
"improving sharia performance based." » "improving sharia performances based.", "improving thermal performance based.", "improving care performance based.", "improving sharia performance measures.", "improving shared performance based.", "improving social performance based."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("improving bank performance review.") OR ("improving sharia performance based."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"improving bank performance review.\") OR (\"improving sharia performance based.\"))".
• Removing quotes may allow a broader search: (( improving bank performance review. ) OR ( improving sharia performance based. )).
• Adding a wildcard symbol may retrieve word variants: (("improving bank performance review.") OR ("improving sharia performance based."))*.