Hi Sir,
I have gone through all the png that you have provided.
Basically you have installed a module to add custom fields in your product.
And you are looking for searching products based on those fields rather than options.
We can do that in 2 days time if give an opportunity.
We have worked for multiple clients for opencart.
We have developed custom plugins and themes for many of them.
Hope to hear from you soon.
Please feel free to contact for any clarification required.
Thanks,
GKart Tech. Pvt. Ltd.