to search for something amongst other things

We then had to spend about half an hour fossicking around for our bags. 然后我们花了半个小时找包。

to look for gold or valuable stones, especially in places where these things were once dug from the ground

They travelled to Glenalva to try fossicking for sapphires. 他们前往格兰纳尔瓦试图挖到蓝宝石。