search partynnoun: Refers to person, place, thing, quality, etc.
(group searching for missing person)
搜索救援组 sōu suǒ jiù yuán zǔ
A search party has set off up the mountain to look for the missing climber. People from the neighbourhood are forming a search party to find the missing boy.
Collins Chinese Dictionary Plus (3rd edition), 2011:
search partyn [c] 搜索队(隊) sōusuǒduì
to send out a search party (for sb) 派搜索队(隊)（寻(尋)找某人） pài sōusuǒduì（xúnzhǎo mǒurén）