To help you find the specific PDF, I need a bit more context. There are many papers and reports by authors with those surnames. Could you clarify any of the following?

If you need help finding specific chapters or have questions about a particular grammar rule from the book, I can help! To provide the best assistance, let me know: Which are you in? (Class 8, SSC, HSC?) g., Narration or Prepositions)? Do you need help solving a specific exercise from the book?

Advanced Learner’s Functional English by Chowdhury & Hossain is a widely used grammar and composition series in Bangladesh, catering to students from Class 5 through HSC (Class 11–12) and those preparing for competitive exams like the BCS.

If I can't find specific information, I'll have to create a general framework for a guide, assuming the content covers areas common to their expertise. For instance, if it's about sustainable development, the guide could outline topics like environmental issues in South Asia, policy frameworks, economic analysis, case studies, and recommendations for sustainable practices.