1. They say that April and May are the best time for tourists to watch the most beautiful scenes of Sapa town.
2. They consider that Tuan Chau Island is one of the most beautiful ones among 1969 big and small islands in Ha Long Bay.
→ _It is considered that Tuan Chau Island is one of the most beautiful ones among 1969 big and small islands in Ha Long Bay. 
3. They report that there are around 85 fish sauce producers in Phu Quoc.
→ _It is reported that there are around 85 fish sauce producers in Phu Quoc.__
4. They expect that tourists should prepare for sudden rains in sunny season, sometimes rocky ones in Da Lat.
→It is expected that tourists should prepare for sudden rains in sunny season, sometimes rocky ones in Da Lat. 
5. People know that Hoi An used to be the port where traders from Europe, India, China and Japan met.
→ _It is known that Hoi An used to be the port where traders from Europe, India, China and Japan met. 
6. They have claimed that Bai Dinh Pagoda has the largest bronze Buddha statue in Asia.→ _It is said that April and May are the best time for tourists to watch the most beautiful scenes of Sapa town
→ It is claimed that Bai Dinh Pagoda has the largest bronze Buddha statue in Asia. 
7. People believe that diving in Hon Mun Island must be the best experience during our Viet Nam excursions
→ It is belived that diving in Hon Mun Island must be the best experience during our Viet Nam excursions 
8. They recognize that Nha Trang is one of the most famous coastal cities in Viet Nam.
→ It is recognized that Nha Trang is one of the most famous coastal cities in Viet Nam._