The page shows up and disappears + GWT

Hi, i have website on expired domain i was make some linkbuilding, and its start showing on some kws in google, and then site disappear from kw serp. I should make stronger backlinks to stabilize it?

And i see some strange thing example:

Keyword - not showing
keyword1 - not showing
keyword3- not showing

but when i go in to GWT to my website panel, and i press check url and index website
immediately keyword start showing for 1-2 days

Keyword - 50
keyword1 - 60
keyword3- 70

and next they are disappear again, some one have similar problem?