Perhaps you should try some spelling variations:
"neutrosophic graphs" » "neutrosophic graph", "neutrosophic triples", "neutrosophic loops"
"eutrophic graph" » "entropic graph", "neutrosophic graph"
"centric graph" » "generic graph", "metric graphs", "centric group"
"topic graph" » "logic 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: (((("eutrophic graph") OR ("neutrosophic graphs"))) OR ((("centric graph") OR ("topic graph")))).
• Removing quotes may allow a broader search: (((( eutrophic graph ) or ( neutrosophic graphs ))) or ((( centric graph ) or ( topic graph )))).
• Adding a wildcard symbol may retrieve word variants: (((("eutrophic graph") or ("neutrosophic graphs"))) or ((("centric graph") or ("topic graph"))))*.