Perhaps you should try some spelling variations:
"query routing algorithm" » "query modeling algorithm" (Expand Search), "query finding algorithm" (Expand Search), "query making algorithm" (Expand Search)
"element method algorithm" » "element network algorithm" (Expand Search), "element means algorithm" (Expand Search), "element mean algorithm" (Expand Search)
"element study algorithm" » "element wsindy algorithm" (Expand Search), "element td3 algorithm" (Expand Search), "element seu algorithm" (Expand Search), "relevant study algorithm" (Expand Search), "present study algorithm" (Expand Search), "recent study algorithm" (Expand Search)

Try widening your search to All Fields.

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