Search
Investigation
noun, verbal noun
そうさく
捜査 (そうさ) Criminal Investigation, Manhunt
操作 (そうさ) Operation, Handling, Manipulation
捜索 (そうさく) Search, Investigation
検索 (けんさく) Lookup, Internet Search
探索 (たんさく、not on WK) Search, Lookup, Hunt, Exploration, Investigation
The Search was soo そう suck さく because it was unsuccessful.