Perhaps you should try some spelling variations:
"autoregressive with endogenous annual" » "autoregressive with endogenous canonical", "autoregressive with endogenous mannosyl", "autoregressive with endogenous capital"
"autoregressive with endogenous input" » "autoregressive with endogenous conduct", "autoregressive with endogenous inducer", "autoregressive with endogenous income"
"autoregressive with exogenous input" » "autoregressive with exogenous inputs", "autoregressive with exogenous impacts", "autoregressive with exogenous insulin"

Try widening your search to All Fields.

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: (("autoregressive with exogenous input") OR ((("autoregressive with endogenous input") OR ("autoregressive with endogenous annual")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"autoregressive with exogenous input\") or (((\"autoregressive with endogenous input\") OR (\"autoregressive with endogenous annual\"))))".
• Removing quotes may allow a broader search: (( autoregressive with exogenous input ) or ((( autoregressive with endogenous input ) OR ( autoregressive with endogenous annual )))).
• Adding a wildcard symbol may retrieve word variants: (("autoregressive with exogenous input") or ((("autoregressive with endogenous input") OR ("autoregressive with endogenous annual"))))*.