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

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