I can not see my models when I search it

Perhaps change the order of the tags. Low poly, low, poly, polyart tags are ahead of what the 3D models are primarily of...animals.

still nothing guess the site is rigged

The order the tags appear has not changed. Try deleting all of the tags, except animals and save the model again. Refresh your screen and see if the search engine comes up with your model. It might not come up in the first few pages.

@madtrollstudio, free models are not showing in search result together with commercial models. You need to search them separately.

@TazMan2000, what makes you think that tag order has any effect on search result?

LemonadeCG,
It was a theory. Nobody else was helping.

works for me though,
if i search for polyart, mammal ( two of your tags) and look for free models, its in the top row.

https://www.cgtrader.com/free-3d-models?keywords=polyart+mammal