I'm seeing these search functions:
1) Summary of Campaigns - dark blue bar at top of list
Campaign, Orders, Budget, Status, Spend, Impr, Clicks, CTR, Avg.Pos., Conversions, Avg.CPC
2) Select and Order - same as Summary page
Order name, Order start date, Order end date, Status, Spend, Impr, Clicks, CTR %, Avg.CPC, Avg.Pos.
3) Ads - Saved Ads - dark blue bar
Ad title, Impr, Clicks, CTR, Avg.CPC, Spend, Avg.Pos.
But I don't see any search function for keywords, only campaign and ad stuff. I'm sure the browser's search function will work on a page-by-page basis. Hopefully, though, a more generalized search will be available soon, like search for a text string in any component. I sent feedback along those lines ...