Perhaps you should try some spelling variations:
interactions fractional » interaction fractional, interactions functional, interactions practical
fractional programming » functional programming, practical programming
programming analysis » program analysis
microarray https » microarrays https, microarray chips, microscopy https

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

• Performing a fuzzy search may retrieve terms with similar spellings: interactions fractional programming analysis microarray https~.
• Adding a wildcard symbol may retrieve word variants: interactions fractional programming analysis microarray https*.