Perhaps you should try some spelling variations:
"binary based level optimization algorithm" » "binary based global optimization algorithm" (Expand Search), "binary based based optimization algorithm" (Expand Search)
"linac camera dog optimization algorithm" » "linac camera _ optimization algorithm" (Expand Search), "linac camera igdt optimization algorithm" (Expand Search)

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• Performing a fuzzy search may retrieve terms with similar spellings: (("binary based level optimization algorithm") OR ("linac camera dog optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"binary based level optimization algorithm\") OR (\"linac camera dog optimization algorithm\"))".
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