Example of a find command that doesn't work as expected. The 'ls' command is only executed on the *.tsv files due to the way the expression is evaluated: from left to right with the implicit '-and' between the second '-name' and '-exec' exec having higher precedence than the '-or' between the two '-name' tests..

find_examples.sh

find . -name "*.csv" -or -name "*.tsv" -exec ls -lh {} \;

# this is actually executed as:
find . -name "*.csv" -or \( -name "*.tsv" -exec ls -lh {} \; \)

# when what you wanted was: 
find . \( -name "*.csv" -or -name "*.tsv" \) -exec ls -lh {} \; 

# the general recommendation is to use xargs inplace of the -exec action
find . -name "*.csv" -or -name "*.tsv" | xargs ls -lh