After two-weeks search, his body was found in woodland.

英訳に間違いが有れば正してください。

二週間の捜索の後、彼の死体は森林から発見された。
After two-weeks search, his body was found in woodland.

ヒント
二週間の捜索

答え a two-weekにする

After a two-week search, his body was found in woodland.

冠詞+数詞+日時を表す名詞で単数名詞を限定修飾

the ten-year average
10年間の平均