Perhaps you should try some spelling variations:
practical nuclear » tactical nuclear, practice nuclear, fractional nuclear
practical nucleic » practice nucleic, practical nurses, tactical nuclear
ban treaty » a treaty
test ban » west bank, test bed

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: ((practical nuclear) OR (practical nucleic)) test ban treaty.
• Adding a wildcard symbol may retrieve word variants: ((practical nuclear) or (practical nucleic)) test ban treaty*.