逆探知[gyakutanchi] phone trace
金属探知機[kinzokutanchiki] metal detector
金探し[kinsagashi] searching for gold
厳探[gentan] strict search
伺い探る[ukagaisaguru] to spy out

私立探偵[shiritsutantei] private detective
手探り[tesaguri] fumbling
人探し[hitosagashi] searching for someone
あら探し[arasagashi] finding fault
探し求める[sagashimotomeru] to search for

飲み放題[nomihoudai] all you can drink
演習問題[enshuumondai] practice problem
演題[endai] subject of an address
応用問題[ouyoumondai] application problem
歌題[kadai] name of poem

課題[kadai] subject
画題[gadai] motif
解題[kaidai] synopsis
改題[kaidai] changing a title
外交問題[gaikoumondai] diplomatic issue