for/from want of
由于缺少......
The flowers died from want of water.
这些花由于缺少水而枯死了。
Some of the wounded soldiers died for want of medicine.
有些士兵因为缺乏药物而死去。

for the use of
供......使用的
This parking lot is for the use of employees only.
这个停车场只供员工使用。
This dining hall is for the use of teachers.
这个饭堂是供教师使用的。

in support of
为了支持......，为了拥护......
He spoke at the meeting in support of my idea.
他在会上讲话支持我的想法。
They decided to stay in support of the new leadership.
为了支持新的领导班子，他们决定留下来。

so as to
为了（做）......，以便（做）......
They made a lot of lively programs so as to attract more children.
为了吸引更多的孩子，他们制作了很多生动活泼的节目。
I left home at 5:00 in the morning so as to be there on time.
我早上5点钟就出门，以便准时到达那里。

in search of
为了寻找......，为了寻求......
He went to the south in search of better prospects.
他为了寻找更好的前途到南方去。
She immigrated to New Zealand in search of a quiet life.
她为了过上平静的生活移民到新西兰去。
for the sake of/for one's sake

为......起见，为了......
His family moved to the countryside for the sake of his son's health.
他一家为了他儿子的健康搬到乡下去。
He betrayed his friend for money's sake.
他为了钱而出卖自己的朋友。

for one's own safety
为了某人自身的安全
For your own safety please don't smoke inside the plane.
为了你自身的安全，请不要在飞机上抽烟。
Please fasten your seat belt for your own safety.
为了你们自己的安全，请系上安全带。