With every successive year, Lieve has honed her documentary style and has never been afraid of tackling difficult subjects. Her portfolio includes work on AIDS in Africa, women living without men after the Rwanda genocide, breast cancer, and maternal mortality in the Democratic Republic of the Congo. She has also been involved in interesting collaborations with journalist and friend Annemie Struyf - they have worked on A La Limite, a project about love and death, and My Status Is Positive, a book about living with HIV. The two subsequently joined forces to set up the Hope For Girls Foundation in 2005, with the aim of building a refuge for vulnerable girls in Kenya. The project has since expanded to Europe, and Lieve and Annemie's achievements were honoured with a European Citizenship Award in 2017.
Lieve has also collaborated with Dutch-language Belgian author and poet Erwin Mortier, illustrating both a collection of his poetry and providing images for a book on encounters with underage refugees living in shelters in Brussels.