It is a collection that gathered a total of 25 papers published in the recent last 10 years. The contents of the collection are an experiments, explorations, discoveries on some issues of regional and world history, of Vietnamese history and culture ... Each paper is an independent study, an experiment in its approaching and thinking on professional issue or problem based on multidimensional, multidisciplinary and interdisciplinary approaches. Not all experiments and explorations are as successful as expected. But it is the truthfulness in cognition and seriousness and cautiousness in professional operations and performances and the efforts to find new approaches and interpretations in the subject matters that proposed.