Perhaps you should try some spelling variations:
"12 educational research center" » "12 education research center" (Expand Search), "12 educational resources center" (Expand Search), "12 operational research center" (Expand Search), "12 educational research career" (Expand Search), "12 educational research under" (Expand Search), "12 educational research register" (Expand Search), "_ educational research center" (Expand Search), "改革 educational research center" (Expand Search), "low educational research center" (Expand Search)
"ibm national research centre" » "ibm operational research centre" (Expand Search), "ibm translational research centre" (Expand Search), "ibm international research centre" (Expand Search), "_ national research centre" (Expand Search), "a national research centre" (Expand Search), "12 national research centre" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("12 educational research center") OR ("ibm national research centre"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"12 educational research center\") OR (\"ibm national research centre\"))".
• Removing quotes may allow a broader search: (( 12 educational research center ) OR ( ibm national research centre )).
• Adding a wildcard symbol may retrieve word variants: (("12 educational research center") OR ("ibm national research centre"))*.