Perhaps you should try some spelling variations:
integration rationale » integration regional, integration functional, introduction rationale
rationale programme » national programme, national programmes, regional programme
problem microarray » probe microarray, proteome microarray, from microarray
programme problem » programmes problems, program problem, programs problem
microarray https » microarrays https, microarray chips, microscopy https

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• Performing a fuzzy search may retrieve terms with similar spellings: integration rationale programme problem microarray https~.
• Adding a wildcard symbol may retrieve word variants: integration rationale programme problem microarray https*.