Try as/though he would, he still failed.

他试过多次了，却依旧失败。

youdao

Hard as he worked, he still failed in the exam.

尽管他很用功，但他考试还是不及格。

youdao

Though he ran as fast as a hare, he still failed to catch the train.

尽管他跑得像野兔一样快，他还是没能赶上火车。

youdao

His boat crossed the Antarctic Circle in three places, but he still failed to sight land.

VOA: special.2009.06.03

Worse still, he failed to get the Bundesbank on side.

ECONOMIST: The Bundesbank bites back

Makukula said he still intends to leave Benfica, where he has failed to secure a regular place since Spanish coach Quique Flores took over this season, and is considering other offers.

BBC: Mowbray ends interest in Makukula

Kieron Dyer's pace down the right wing proved a menace to the Potters' defence, but with his fitness clearly still an issue, he failed to start the second half, giving way to Alessandro Diamanti.

BBC: West Ham 0-1 Stoke City