mysql> select word, hex(word) from oldword where word = 'cobijcas';
+-------------+------------------------+
| word        | hex(word)              |
+-------------+------------------------+
| cobijças    | 636F62696AC3A76173     |
| cobíj́cas    | 636F62C3AD6ACC81636173  |
+-------------+------------------------+
2 rows in set (0,05 sec)

mysql> select word, hex(word) from oldword where word like 'cobijcas';
+-----------+--------------------+
| word      | hex(word)          |
+-----------+--------------------+
| cobijças  | 636F62696AC3A76173 |
+-----------+--------------------+
1 row in set (0,05 sec)