how to open closed window in chrome

Yes, there is.

1. Click on the 3-bars below the 'X' Close button.
2. Click Recent Tabs (or "History and recent tabs" in newer versions).
3. Click on the first item where it states "N Tabs'; where N is the number of open tabs in the windows that was closed.

It will even work if you close the browser completely.

Added:
You could also open the History tab with CTRL-H and select each tab to open.

Ctrl+Shift+T also works when multiple tabs have been closed.