Labor, toil, strive, try, endeavor, work, take pains, bestir one's self, fall to work, work with a will, leave no stone unturned, do one's best, make effort, make great efforts.
EXERT ONE'S SELF
Meaning of EXERT ONE'S SELF in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012