1. Someone I really admire is Ngo Quyen. (Rearranged)
2. My father does the housework most of the days because he's at work for least amount of time. (Rearranged for clarity)

Rewritten sentences:

1. Tim is going to make a pizza this Saturday with his classmates. (Added "going to" for future action)
2. It's not necessary to bring sleeping bags. (Replaced "need" with "necessary" for a more formal tone)