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

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