1) He tried his best to overcome the difficulties.
2) try one's best to overcome the difficulty
3) He got the better of his difficulties.
4) overcoming difficulties
5) overcome [英][,əʊvə'kʌm] [美]['ovɚ'kʌm]
6) surmount many difficulties
①用坚强的意志和力量战胜（缺点、错误、坏现象、不利条件等）：～急躁情绪 ㄧ～不良习气 ㄧ群策群力，～重重困难。②克制；忍受（困难）：这儿的生活条件不太好，请诸位～一下。