Site Only in Advanced Search

[vanekpavel]

Hi
i have one site, which have done very well on google from its beggining, but after two months it had almost disappeared from results(espacially root index.html), although it is PR5.

Now i can see this root index.html only in results of advance search. For example i do normall search and i am nowhere in top100, then i do advance search for 10results and i am there. So i can see my site in google only with advance search and only sometimes.

What do you think it has happen? i am just thinking about moving all content to another domain, because i am really tired to see google not working properly for few months.