?尽力

...尽快 with all speed; as soon as possible; as quickly as possible 尽力 to strive one's hardest; to spare no effort 尽力而为 to strive; to try one's utmost ..

?奋力

... 奋不顾身 regardless of perils 奋力 one's best; to do everything one can; to spare no effort 奋武扬威 a show of strength ...

?不遗余力

To spare no effort;To got all out;to do one's best不遗余力 "I've got his card,"" John said, handing it over.""我有他的名片,""约翰说,一边将名片递了过来。