You will need to write a little SQL.
You can
Code:
SELECT from `the_table` where `the_column` like '%the_phrase_to_search%'
if 'the_phrase_to_search' is 'cs' then it will find 'pcs800', pcs900', 'qcs1111' .. any string containming the substring 'cs'. the ” % ” character is a SQL 'wildcard'
There is an option to paste a SELECT SQL statement template from the table context menu
If you want to search in more columns just use logical OR
Code:
SELECT from `the_table` where `the_first_column` like '%the_phrase_to_search%' OR `the_second_column` like '%the_phrase_to_search%'
'quick filters' are coming soon (in 5.3 or 5.31 probably), so that you can just right-click a cell and select a search option from here.