first page on google disapear

hello bh mem, yeasterday my site disapear from google first page
with a specific keyword... what happen?

it still in the search engine but when i search it with the domain ;(

Kounamouta,

Don't worry about it man. It happens all the time with google. They're algorithm is kind of weird at times.

If you're site is still gone in a week then you've got some problems. Until then just keep building links and working on onpage seo.