Perhaps you should try some spelling variations:
"data modeling algorithm" » "data making algorithm" (Expand Search), "data modelling algorithm" (Expand Search), "data models algorithm" (Expand Search)
"data routing algorithm" » "data finding algorithm" (Expand Search), "data making algorithm" (Expand Search), "data clustering algorithm" (Expand Search), "data groupings algorithm" (Expand Search), "data relating algorithm" (Expand Search), "data using algorithm" (Expand Search)
"elements tree algorithms" » "elements three algorithms" (Expand Search), "elements art algorithms" (Expand Search), "elements two algorithms" (Expand Search), "elements ree algorithms" (Expand Search), "element ree algorithms" (Expand Search), "elements res algorithms" (Expand Search)

Try widening your search to All Fields.

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