Perhaps you should try some spelling variations:
operations preprocessing » variations preprocessing, applications preprocessing, operations refocusing
extraction preprocessing » extraction processing, extraction process, extraction processes
developing microformats » developing microsoft, developing bioinformatics, developing microcomputer
microformats https » microarrays https, microformat hatom, microformats what

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "function ((operations preprocessing) OR (extraction preprocessing)) developing microformats https~".
• Adding a wildcard symbol may retrieve word variants: function ((operations preprocessing) OR (extraction preprocessing)) developing microformats https*.