Perhaps you should try some spelling variations:
"light modeling algorithm" » "light making algorithm" (Expand Search), "niche modeling algorithm" (Expand Search), "climate modeling algorithm" (Expand Search)
"level coding algorithm" » "level cosine algorithm" (Expand Search), "level finding algorithm" (Expand Search), "level routing algorithm" (Expand Search), "level according algorithm" (Expand Search), "level modeling algorithm" (Expand Search), "level using algorithm" (Expand Search)
"elements box algorithm" » "elements best algorithm" (Expand Search), "elements _ algorithm" (Expand Search), "elements ii algorithm" (Expand Search), "elements b algorithm" (Expand Search), "elements upon algorithm" (Expand Search)

Try widening your search to All Fields.

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