Here are the corrections for each sentence from the text:

1. **Correct:** This girl is the most beautiful of the two daughters he has.
**(Remove "that")**

2. **Correct:** Frank plays tennis worse than all the other players.
**(Change "worse of all" to "worse than all the other")**

3. **Correct:** The more he tries, the more he succeeds.
**(No change needed)**

4. **Correct:** She can pronounce English words more correctly than she could last term.
**(Change "more correct" to "more correctly")**

5. **Correct:** In this class, the students are talking more loudly than the teacher.
**(Change "more louder" to "more loudly")**

6. **Correct:** This summer is hotter and drier than last summer.
**(Change "winder" to "drier")**

7. **Correct:** You should practice English more often to be a better speaker of English.
**(Change "practise" to "practice" and "oftener" to "more often")**

8. **Correct:** Hà Anh can now speak English better than the last time I met him.
**(Change "more well" to "better")**

9. **Correct:** She is much more intelligent than Nam.
**(Remove "does")**

10. **Correct:** The richer he is, the more miserable he gets.
**(Change "more rich" to "richer")**

Feel free to ask if you need more assistance!