Perhaps you should try some spelling variations:
"bioenergy carbons adsorption" » "bioenergy carbon adsorption", "bioenergy ions adsorption", "bioenergy carriers adsorption", "bioenergy crop adsorption", "energy carbon adsorption"
"bioenergy crops adsorption" » "bioenergy ions adsorption", "bioenergy cells adsorption", "bioenergy sols adsorption", "energy crops adsorption", "bioenergy from adsorption"

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"bioenergy crops adsorption\") OR (\"bioenergy carbons adsorption\"))".
• Removing quotes may allow a broader search: (( bioenergy crops adsorption ) OR ( bioenergy carbons adsorption )).
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