.sample {
    width: 100%;
}

.sample td:nth-child(1),
.sample th:nth-child(1) {
  width: 30%;
  word-break: break-word;
}

.sample td:nth-child(2),
.sample th:nth-child(2) {
  width: 70%;
}

Delete the table layout, add

word-break: break-word

to the left.