try one's best to look for/search
spare no effort to look for /search
寻找的介词用for，search不用加介词
try one's best努力做某事
spare no effort不遗余力做某事
东北师范大学“明日乡”支教团为你做出的解答，希望你满意且有所收获！
try one's best to find
put one's all efforts to find
keep searching till one die
感谢您的支持~
try one's most to find out
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