Complex sentence: Thai citizens enjoy visa-free access to all member states of the Association of Southeast Asian Nations (ASEAN members) and it is also the only ordinary passports in Southeast Asia that provide visa-free access to Russian Federation.
Split into simpler sentences: Thai citizens enjoy visa-free access to all member states of the Association of Southeast Asian Nations (ASEAN members). Thai Passport is also the only ordinary passports in Southeast Asia that provide visa-free access to Russian Federation.