Perhaps you should try some spelling variations:
practical nuclear » tactical nuclear, practical nucleic, practice nuclear
practical nuclei » practical nucleic, practical nurses, practical nurse
nuclei tev » nuclei two, nuclei after, nuclei three
a treaty » _ treaty
tev ban » test ban
test a » test act

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