Here are some ways to use it in a sentence:
* "Ang ganda ng tanawin, kamangha-mangha!" (The scenery is beautiful, amazing!)
* "Kamangha-mangha ang mga ginawa niya para sa akin." (What he did for me was amazing.)
* "Ang kanyang talento ay kamangha-mangha." (His talent is amazing.)
You can also use the shorter form "kamangha" which is still understood as "amazing" but less formal.
Note: "Amazing" can also be translated as "kahanga-hanga", which means "admirable" or "impressive". However, "kamangha-mangha" carries a stronger sense of wonder and awe.