Perhaps you should try some spelling variations:
"linac based joint optimization algorithm" » "linac based policy optimization algorithm" (Expand Search), "linac based igdt optimization algorithm" (Expand Search), "linac based chimp optimization algorithm" (Expand Search), "lina based joint optimization algorithm" (Expand Search)
"binary basic process optimization algorithm" » "binary batch process optimization algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("linac based joint optimization algorithm") OR ("binary basic process optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"linac based joint optimization algorithm\") OR (\"binary basic process optimization algorithm\"))*".
• Removing quotes may allow a broader search: (( linac based joint optimization algorithm ) OR ( binary basic process optimization algorithm ))*.