There are two main ways to look for a specific value in the open data portal.  One method will search the entire dataset.  The other will filter a specific column.

1. Search entire dataset

Within the "Data" tab, you can use the search bar in the upper right corner. This bar will search the entire dataset.

2. Filter single column

You can also construct more advanced queries via filtering a column.  Select the blue Actions button from the top right corner of the screen to to open the filter menu.  From there select "Query Data"

Click the video walkthrough link for a short video to guide you through the rest of the process.