How to find that a word/words in a column is present in another column consisting a sentence [duplicate]

Answer 1

Or use a dplyr & stringr solution. But in principle its the same idea:

library(tidyverse)
library(stringr)
df %>% 
  mutate(result=str_detect(df$string,gsub(" ", "|", df$substring)))
                 substring                 string result
1             my new phone this is a mobile phone   TRUE
2 She would buy new phones Yes, I have two phones   TRUE
3            telephonessss       my old telephone  FALSE
4             telephone234           telephone234   TRUE