lay off / (be or get) laid off = to lose a job because business is slow.

Even though he was a good worker, he was laid off because the company wasn’t doing very well. (passive voice)

lend a hand = help

When Tom couldn’t fix the printing press, he asked Jose to lend him a hand.

"Could you lend me a hand with this?"

look for = try to find; search

The pirates spent two years looking for treasure and finally they found it.

look (it) up = to find information

If you need to find a good price on a car, you can look it up on the internet.

You can also look up information in a book.