Perhaps you should try some spelling variations:
"path tracking algorithm" » "path tracking algorithms" (Expand Search), "path training algorithms" (Expand Search), "path making algorithm" (Expand Search)
"protein coding algorithm" » "protein cosine algorithm" (Expand Search), "protein modeling algorithm" (Expand Search), "protein finding algorithm" (Expand Search), "protein binding algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("path tracking algorithm") OR ("protein coding algorithm"))) OR ("element method algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"path tracking algorithm\") OR (\"protein coding algorithm\"))) OR (\"element method algorithm\"))".
• Removing quotes may allow a broader search: (((( path tracking algorithm ) OR ( protein coding algorithm ))) OR ( element method algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("path tracking algorithm") OR ("protein coding algorithm"))) OR ("element method algorithm"))*.