Perhaps you should try some spelling variations:
"walk and talk" » "wall and talk", "walt and talk", "falk and talk", "walk and tal", "walk and tall"
"wark and talk" » "wark and tal", "wark and tall", "work and talk", "war and talk", "ward and talk"
"mark and talk" » "mark and tal", "mark and tall", "mar and talk", "marx and talk"
"wark and task" » "work and task", "war and task", "ward and task", "wark and tasa"

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 ((((("wark and talk") OR ("mark and talk"))) OR ("wark and task"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"walk and talk\") OR (((((\"wark and talk\") OR (\"mark and talk\"))) OR (\"wark and task\"))))".
• Removing quotes may allow a broader search: (( walk and talk ) OR ((((( wark and talk ) OR ( mark and talk ))) OR ( wark and task )))).
• Adding a wildcard symbol may retrieve word variants: (("walk and talk") OR ((((("wark and talk") OR ("mark and talk"))) OR ("wark and task"))))*.