Perhaps you should try some spelling variations:
collatz conjecture » color conjecture
calabi conjecture » color conjecture, causal conjecture, catalan's conjecture
abc conjecture » a conjecture, _ conjecture

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: ((((calabi conjecture) OR (abc conjecture))) OR (collatz conjecture)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((calabi conjecture) OR (abc conjecture))) or (collatz conjecture))".
• Adding a wildcard symbol may retrieve word variants: ((((calabi conjecture) OR (abc conjecture))) or (collatz conjecture))*.