Man pages matching name gnutls_dh_params_import_raw in section 3:

gnutls_dh_params_import_raw.3.en	debian 10 / gnutls-doc
gnutls_dh_params_import_raw.3.en	debian 11 / gnutls-doc
gnutls_dh_params_import_raw.3.en	debian 12 / gnutls-doc