Perhaps you should try some spelling variations:
"stable fast reactor" » "stable fault reactor", "state fast reactor", "enable fast reactor", "stables fast reactor", "stables cast reactor", "senable fast reactor", "stable fast reaction"
"table fast reactor" » "tables fast reactor", "tables cast reactor", "enable fast reactor", "table fast reaction"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"stable fast reactor\") OR (\"table fast reactor\"))".
• Removing quotes may allow a broader search: (( stable fast reactor ) OR ( table fast reactor )).
• Adding a wildcard symbol may retrieve word variants: (("stable fast reactor") OR ("table fast reactor"))*.