Perhaps you should try some spelling variations:
"noble gas" » "noble gast" (Expand Search)
"noble gass" » "noble gasts" (Expand Search), "noble gauss" (Expand Search), "noble glass" (Expand Search), "noble grass" (Expand Search)
"noble gasst" » "noble gastst" (Expand Search), "noble gausst" (Expand Search), "noble glasst" (Expand Search), "noble grasst" (Expand Search), "noble gast" (Expand Search), "noble hasst" (Expand Search), "noble lasst" (Expand Search)
"noble gans" » "noble hans" (Expand Search), "noble ganz" (Expand Search), "noble ans" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("noble gas") OR ("noble gass"))) OR ("noble gasst"))) OR ("noble gans"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"noble gas\") OR (\"noble gass\"))) OR (\"noble gasst\"))) OR (\"noble gans\"))".
• Removing quotes may allow a broader search: (((((( noble gas ) OR ( noble gass ))) OR ( noble gasst ))) OR ( noble gans )).
• Adding a wildcard symbol may retrieve word variants: (((((("noble gas") OR ("noble gass"))) OR ("noble gasst"))) OR ("noble gans"))*.