Perhaps you should try some spelling variations:
"neurotrophic graph" » "neurotrophic growth", "neurotrophic nap", "neurotrophic therapy"
"entropic graph" » "entropic graphs", "entropic trace", "entropic gravity"
"centric graph" » "generic graph", "metric graphs"
"topic graph" » "logic graph"
"neutrosophic graph" » "neutrophil graph", "eutrophic graph"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("neutrosophic graph") OR ("neurotrophic graph"))) OR ((((("entropic graph") OR ("centric graph"))) OR ("topic graph")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"neutrosophic graph\") OR (\"neurotrophic graph\"))) or (((((\"entropic graph\") or (\"centric graph\"))) or (\"topic graph\"))))".
• Removing quotes may allow a broader search: (((( neutrosophic graph ) OR ( neurotrophic graph ))) or ((((( entropic graph ) or ( centric graph ))) or ( topic graph )))).
• Adding a wildcard symbol may retrieve word variants: (((("neutrosophic graph") OR ("neurotrophic graph"))) or ((((("entropic graph") or ("centric graph"))) or ("topic graph"))))*.