Perhaps you should try some spelling variations:
"elements method algorithm" » "elements mould algorithm" (Expand Search)
"data codes algorithm" » "data colony algorithm" (Expand Search), "data cosine algorithm" (Expand Search), "data models algorithm" (Expand Search)
"data scheduling algorithm" » "task scheduling algorithm" (Expand Search), "ahead scheduling algorithm" (Expand Search)

Try widening your search to All Fields.

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