How did Hinduism and Buddism spread to southeast aisa

Hinduium
Hinduism came to southeast aisa around the first century CE. It is believed
that Hindu priest from India were invited to the courts of southeast asian rulers to teach indian culture.
Many historians concluded that this was because India was considered to be one of the most advanced civilisations
in those days. The kings wanted to learn from the Indians.

BUDDHISM
Buddhism came to southeast asia c.300CE. It was brought by the Indian and Chinese traders as well as the Buddhist missionaries who travelled with them.