What is the fine-grained topic of the following text: FRANKFURT, Jan 29 (Reuters) - Volkswagen's trucks business Traton wants to use alliances with rivals in China, the United States and Japan to tap into global growth and achieve a return on sales of nine percent, Chief Executive Andreas Renschler said on Tuesday. Only return the topic.
Volkswagen's trucks business Traton's strategy for global growth and sales return goal.