Perhaps you should try some spelling variations:
"bi 1984 conference" » "bi 1st conference" (Expand Search), "bi 198ds conference" (Expand Search), "bi 1981st conference" (Expand Search), "bi 198ais conference" (Expand Search)
"ali 1984 conference" » "ali 1st conference" (Expand Search), "ali 198ds conference" (Expand Search), "ali 1981st conference" (Expand Search), "ali 198ais conference" (Expand Search), "ali 1981 conference" (Expand Search), "ali 1986 conference" (Expand Search), "ali 1961 conference" (Expand Search)
"bi 4 conference" » "bi ds conference" (Expand Search), "bi 1st conference" (Expand Search), "bi ais conference" (Expand Search), "big 4 conference" (Expand Search), "bi a conference" (Expand Search), "pi 4 conference" (Expand Search)

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: "((\"bi 4 conference\") OR (((\"bi 1984 conference\") OR (\"ali 1984 conference\"))))~".
• Removing quotes may allow a broader search: (( bi 4 conference ) OR ((( bi 1984 conference ) OR ( ali 1984 conference ))))~.
• Adding a wildcard symbol may retrieve word variants: (("bi 4 conference") OR ((("bi 1984 conference") OR ("ali 1984 conference"))))*.