Issue with terms which are slight variant of name

[freakbird]

Hey,

I have been using the cleo-primer from
https://github.com/jingwei/cleo-primer

and have found one seriously annoying issue. For eg. see this element in my data file.
12205
420.000000
angel investor
angel investings
angel investing
angel investments
angel investment
angel investors
angel investor
business angel
informal investor
angel
investor

It gives null when queried with 'angel investments', 'angel investings'. On rigourous testings I have found out that it only shows this type of null when the queried term is just a slight variant of the name in the end. Please let me know how to solve this or is this really a bug in cleo-primer.