Perhaps you should try some spelling variations:
"prepreprocessing methodssss involves" » "preprocessing methods involves" (Expand Search), "prepreprocessing methodology involves" (Expand Search), "prepreprocessing methodsssss involves" (Expand Search), "preprepromising methodssss involves" (Expand Search), "preprepreprocessing methodsssss involves" (Expand Search)
"processing method solves" » "processing methods solves" (Expand Search), "promising method solves" (Expand Search), "preprocessing methods solves" (Expand Search), "processing method solve" (Expand Search), "processing method solved" (Expand Search), "processing method solvents" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("prepreprocessing methodssss involves") OR ("processing method solves"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"prepreprocessing methodssss involves\") OR (\"processing method solves\"))".
• Removing quotes may allow a broader search: (( prepreprocessing methodssss involves ) OR ( processing method solves )).
• Adding a wildcard symbol may retrieve word variants: (("prepreprocessing methodssss involves") OR ("processing method solves"))*.