Perhaps you should try some spelling variations:
"image processing algorithm" » "image modeling algorithm" (Expand Search), "image tracking algorithm" (Expand Search), "image boosting algorithm" (Expand Search)
"rna routing algorithm" » "rna modeling algorithm" (Expand Search), "rna finding algorithm" (Expand Search), "rna making algorithm" (Expand Search), "drone routing algorithm" (Expand Search)
"element data algorithm" » "element data algorithms" (Expand Search), "element update algorithm" (Expand Search), "element atlas algorithm" (Expand Search), "settlement data algorithm" (Expand Search), "relevant data algorithm" (Expand Search), "movement 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 routing algorithm") OR ("image processing algorithm"))) OR ("element data algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"rna routing algorithm\") OR (\"image processing algorithm\"))) OR (\"element data algorithm\"))".
• Removing quotes may allow a broader search: (((( rna routing algorithm ) OR ( image processing algorithm ))) OR ( element data algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("rna routing algorithm") OR ("image processing algorithm"))) OR ("element data algorithm"))*.