How do I search Google Spreadsheets?

Unfortunately there is no searching functionality in the Spreadsheet services. You can get the data for the range you are searching on, and then iterate over it looking for a match. Here’s a simple function that does that:

/**
 * Finds a value within a given range. 
 * @param value The value to find.
 * @param range The range to search in.
 * @return A range pointing to the first cell containing the value, 
 *     or null if not found.
 */
function find(value, range) {
  var data = range.getValues();
  for (var i = 0; i < data.length; i++) {
    for (var j = 0; j < data[i].length; j++) {
      if (data[i][j] == value) {
        return range.getCell(i + 1, j + 1);
      }
    }
  }
  return null;
}