All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and messenger.
Imaam Abu Haneefah is one of the competent Hadeeth scholars who were eligible for practicing Ijtihaad.
As for the Ahaadeeth and reports he had narrated in Hadeeth books, you can search for them in the academic encyclopedia like Shamela and others.
However, it should be noted that the fact that he narrated few Ahaadeeth and reports [presented] in the six books of authentic Prophetic narrations (i.e. Saheeh Al-Bukhari, Saheeh Muslim, Sunan At-Tirmithi, Sunnan Abu Daawood, Sunnn An-Nasaa'i, and Sunan Ibn Maajah) does not undermine his refined status as a leading Hadeeth scholar. Please, refer to “Makaanat Al-Imaam Abu Haneefah fi Al-Hadeeth” by Shaykh Muhammad ‘Abd Ar-Rasheed An-Nu‘maani as he cited the words of other Hadeeth scholars in praise of Abu Haneefah .
For more benefit, please refer to Fatwa 245815.
Allaah Knows best.