Perhaps you should try some spelling variations:
"big 1984 conference" » "big 1st conference" (Expand Search), "big 198ds conference" (Expand Search), "big 1981st conference" (Expand Search), "big 198ccf conference" (Expand Search)
"big ais conference" » "big amic conference" (Expand Search), "big ds conference" (Expand Search), "big hbai conference" (Expand Search)
"big 4 conference" » "big ds conference" (Expand Search), "big 1st conference" (Expand Search), "big ccf conference" (Expand Search), "bi 4 conference" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("big 4 conference") OR ("big ais conference"))) OR ("big 1984 conference"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"big 4 conference\") OR (\"big ais conference\"))) OR (\"big 1984 conference\"))".
• Removing quotes may allow a broader search: (((( big 4 conference ) OR ( big ais conference ))) OR ( big 1984 conference )).
• Adding a wildcard symbol may retrieve word variants: (((("big 4 conference") OR ("big ais conference"))) OR ("big 1984 conference"))*.