Good to hear from you again, and thanks for the question. You can use the parameters described in the “Keyword(s) Search” section of the Settings/Media Library Assistant Documentation tab to get a good solution. Here is an adaptation of the “Search Form and Gallery” example in the Documentation to get you started:
<form id="mla-search-form" action="." method="post">
<input id="mla-search-box" name="search-string" type="text" value="" /> <input id="submit" name="submit" type="submit" value="Search" />
</form>
[mla_gallery s="{+template:({+request:search-string+}|a-bad-term)+}" mla_nolink_text="Enter a search value above to display gallery." mla_search_fields="alt-text,title,terms" mla_terms_taxonomies=attachment_tag mla_search_connector=OR]
If your terms have multiple words separated by spaces, you can match on multi-word phrases in a variety of ways. These are described in detail, with examples, in the “Entering Words and Phrases” portion of the “Terms Search – filtering on taxonomy term names” Documentation section. You can also use the whole_word=true, sentence=true and exact=true parameters to change the matching logic used in the [mla_gallery] shortcode.
I am marking this topic resolved, but please update it if you have problems or further questions regarding the above suggestions. Thanks for your continued interest in the plugin.