Perhaps you should try some spelling variations:
material allocation » material application, materials application, material applications
allocation problems » allocation problem, location problem, education problems
function microarray » function microarrays, functional microarray, function micrornas
problems function » problems functions, problems fiction, problem functional
microarray https » microarrays https, microarray chips, microscopy https

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• Performing a fuzzy search may retrieve terms with similar spellings: material allocation problems function microarray https~.
• Adding a wildcard symbol may retrieve word variants: material allocation problems function microarray https*.