Infructueux (en. Unsuccessful)

Translation into French

However, both duos are unsuccessful in finding Ronaldo so far.
Toutefois, aucun des deux duos ne réussit à trouver Ronaldo.
Example taken from data source: Wikipedia_v1.0
However, their first attempt was unsuccessful.
Cependant, leur première tentative échoua.
Example taken from data source: WikiMatrix_v1
Attempts to express mature apo A-I as an unfused protein were unsuccessful, however.
Cependant, des tentatives pour exprimer l'apo A-I mature sous la forme d'une protéine non fusionnée sont restées sans succès.
Example taken from data source: EuroPat_v3
There have been cases where treatment with Strimvelis has been unsuccessful.
Il y a eu des cas d'échec au traitement par Strimvelis.
Example taken from data source: ELRC-EMEA_v1
The unsuccessful party should bear the costs of the proceedings.
La partie qui succombe devrait supporter les frais de procédure.
Example taken from data source: DGT_v2019
So far, attempts to replace the human cornea using alloplastic material have proven unsuccessful.
Jusqu'ici, les tentatives visant à remplacer la cornée humaine par des matériaux alloplastiques avaient toutes échoué.
Example taken from data source: ELRC-CORDIS_Results_v1
Your life makes me feel unsuccessful.
Ta vie me fais me sentir en échec.
Example taken from data source: OpenSubtitles_v2018