Perhaps you should try some spelling variations:
"walk and talk" » "wall and talk", "walt and talk", "wark and talk"
"walk and task" » "wall and task", "walt and task", "wark and task", "walk and tasa"
"walk and tall" » "wall and tall", "walt and tall", "wark and tall", "walk and tell", "walk and hall", "walk and all"
"walk and tal" » "wall and tal", "walt and tal", "wark and tal"

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

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