Perhaps you should try some spelling variations:
"modified objective convolution algorithms" » "modified objective evolution algorithm", "modified objective solution algorithm"
"modified adaptive ventilation algorithms" » "modified adaptive estimation algorithms", "modified adaptive estimation algorithm", "modified adaptive quantization algorithms", "modified invasive ventilation algorithms", "modified passive ventilation algorithms"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective convolution algorithms") or ("modified adaptive ventilation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective convolution algorithms") OR ("modified adaptive ventilation algorithms")).
• Removing quotes may allow a broader search: (( modified objective convolution algorithms ) or ( modified adaptive ventilation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective convolution algorithms") or ("modified adaptive ventilation algorithms"))*.