I'm trying to build a sina app which will have capabilities of searching statuses based on key word, geo location, date etc...
I cannot find an api which supports what I'm trying to do.
I am aware they have a v1 api which does what I want but it is legacy and no longer accepting apps.
You are right that weibo has removed most of the content search api functionality in v2 of the api.
The api calls that are currently supported are listed here: http://open.weibo.com/wiki/API%E6%96%87%E6%A1%A3_V2/en#Search_API
Content search is labeled only for legacy applications that have good standing.