Perhaps you should try some spelling variations:
"practical nuclear test a treaty" » "tactical nuclear test a treaty", "practical nucleic test a treaty", "practice nuclear test a treaty", "practical nuclear test _ treaty", "practical nuclear test act treaty"
"national nuclear test a treaty" » "international nuclear test a treaty", "national nuclear test _ treaty", "national nuclear test act treaty"

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 ("national nuclear test a treaty")).
• Removing quotes may allow a broader search: (( practical nuclear test a treaty ) or ( national nuclear test a treaty )).
• Adding a wildcard symbol may retrieve word variants: (("practical nuclear test a treaty") or ("national nuclear test a treaty"))*.