Question: Why challenges does word segmentation in Vietnamese pose?
Answer: Acquire very large Vietnamese corpus and build a classifier with it, design a develop a big data warehouse and analytic framework, build a system to incrementally learn new corpora and interactively process feedback.
Alternative answer: to acquire very large Vietnamese corpus and to use them in building a classifier,  design and development of big data warehouse and analytic framework for Vietnamese documents, to building a system, which is able to incrementally learn new corpora and interactively process feedback