modify search to run partial searches rather than starts_with searches

[azneto]

This pull request addresses issue #...

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the Free Software Foundation

I have read the CONTRIBUTING.rst file and understand that
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checks pass with these changes.

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[codecov-commenter]

Codecov Report

Merging #311 (d94869c) into master (261ceb6) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #311   +/-   ##
=======================================
  Coverage   69.21%   69.21%           
=======================================
  Files          30       30           
  Lines        4028     4028           
  Branches      228      228           
=======================================
  Hits         2788     2788           
  Misses       1182     1182           
  Partials       58       58           

Impacted Files	Coverage Δ
machado/forms.py	0.00% <0.00%> (ø)

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