Perhaps you should try some spelling variations:
"rna processing algorithm" » "rna processing algorithms" (Expand Search), "_ processing algorithm" (Expand Search), "signal processing algorithm" (Expand Search), "image processing algorithm" (Expand Search)
"image using algorithms" » "image cosine algorithm" (Expand Search)
"element data algorithm" » "element jaya algorithm" (Expand Search), "element deer algorithm" (Expand Search), "elements data algorithm" (Expand Search)

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("rna processing algorithm") OR ("image using algorithms"))) OR ("element data algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"rna processing algorithm\") OR (\"image using algorithms\"))) OR (\"element data algorithm\"))".
• Removing quotes may allow a broader search: (((( rna processing algorithm ) OR ( image using algorithms ))) OR ( element data algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("rna processing algorithm") OR ("image using algorithms"))) OR ("element data algorithm"))*.