どうかして

by some chance; somehow; in some way

どうかした

どうかして

by mere chance, by some chance, somehow or other, in some way

どうしたら

how can (one) do something

どうか

please, somehow or other

かどうか

whether or not (in phrases like "I don't know whether or not I can come")

どうせだから

might as well; sure, why not; why not use this occasion to...

どかどか

noisily, with loud footsteps

どうかしたのか

どうかしたのですか どうかしたんですか

is something up?, is something wrong?

どちらか

どっちか

either, one (of the two)

どうか宜しく

どうかよろしく

please remember me; please help me; please treat me well; I look forward to working with you

どうにかして

by any means (possible), somehow

どうした訳か

どうしたわけか

somehow; for some reason (or other)

どうにか

in some way or other, one way or another

どうかな

how about...?

どうやら

it seems like, it appears that

どうたら

something-something (e.g. platitudes, waffling); yada yada; so-and-so

はいからうどん

noodles topped with tenkasu

どしどし

rapidly, constantly, one after the other, without hesitation, sound of tramping

先ほどから

さきほどから

since some time ago; for some time; for quite a while