Perhaps you should try some spelling variations:
"modified allocation approximation algorithms" » "modified allocation optimization algorithms"
"modified trained convolution algorithms" » "modified trained evolution algorithm", "modified trained solution algorithm", "modified trained convolutional algorithms", "modified traces convolution 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 trained convolution algorithms") or ("modified allocation approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified trained convolution algorithms") OR ("modified allocation approximation algorithms")).
• Removing quotes may allow a broader search: (( modified trained convolution algorithms ) or ( modified allocation approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified trained convolution algorithms") or ("modified allocation approximation algorithms"))*.