Perhaps you should try some spelling variations:
integration matters » integration models (Expand Search), migration matters (Expand Search), reintegration factors (Expand Search)
competence over » competence after (Expand Search), competence en (Expand Search), competence et (Expand Search)
competences de » competencies de (Expand Search), competences des (Expand Search), competencies del (Expand Search)
competence de » competente de (Expand Search), competencies de (Expand Search), competences des (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: ((competence over) OR (((competence de) OR (competences de)))) integration matters.