Renewed search for missing Vic man

A Melbourne man missing since Christmas Eve is the focus of a renewed search by police.

Sang Quang Nguyen, 36 from Maribyrnong, was last seen when police pulled over his blue Holden sedan, with registration NQH326, west of Horsham more than eight months ago, police say.

Nguyen might have been heading to Mildura or Adelaide but investigators say their inquiries have proved "fruitless" and they are concerned for his welfare.