Assembly searching technologies are important for the improvement of design reusability. However, existing methods require that assemblies possess high-level information, and thus cannot be applied in real-world scenarios. This study proposes a relaxed lightweight assembly retrieval method using vector-based representations, which can be applied to various assembly types and sizes. The proposed method is evaluated on a dataset of 1000 assemblies, showing a significant improvement in retrieval accuracy compared to existing methods. The results demonstrate the potential of the proposed method in real-world applications, such as design reuse and assembly planning.