If you right-click on the “Search” word and then select “Inspect”, a portion of the page will display the HTML. You may have to right-click on the “Search” word and select “Inspect” a second time to have the HTML display your precise element.
What is the pathway you are using for “a_Search”? Maybe like: //a[text()="Search"]
//td[text()="Search Bill of Entry"]/following-sibling::td/a