Search not returning products in control panel

[choval]

I'm trying to search for a product by using a word in the product name.
If I search for it from the store frontend, the product is found just fine.
But if I search for it from the administration panel, it doesn't show up.

Reloading the cache doesn't change anything.

Odd thing is, I can search for the SKU and then just "touch" (click update without changing anything) the product and after "touching" it, the search from the administration panel will work.

Why is the front end and the backend search displaying different results or behaving differently?
I noticed the word "pattern search" in the backend, but using wildcard ( word ) doesn't displays the product either.

I've checked categories, other options and the word case.

[choval]

Found, this is related to languages.
The products where created under an administration panel in spanish. Then I was searching them in English.

Still, products should be searchable in any language.