Below are some tour packages which I recommend :

Tour A:

This 18-day Southeast Asia tour captures the essence of Vietnam, Cambodia, and Thailand. Wander the cultural streets of Hanoi, cruise among the limestone islands of Halong Bay, and experience the dynamic atmosphere of Ho Chi Minh City. Glide through the peaceful canals of the Mekong Delta before traveling to Cambodia to explore the awe-inspiring temples of Angkor in Siem Reap. In Thailand, visit the royal and cultural landmarks of Bangkok, explore the historic ruins of Ayutthaya, and connect with elephants at a responsible sanctuary in Chiang Mai. Finish your journey with relaxing days on the tropical beaches of Phuket.

• Day 1-6 (Vietnam) :

  • Hanoi: Old Quarter by Rickshaw, Water Puppet Show

  • Halong Bay: 2-Day Halong Bay Cruise

  • Ho Chi Minh City: War Remnants Museum, Old Saigon Post Office, Mekong Delta

• Day 7-10 (Cambodia ):

  • Siem Reap: Angkor Wat, Bayon Temple, Banteay Srei Temple

• Day 8-18 (Thailand):

  • Bangkok: Grand Palace, Wat Pho, Long-Tail Boat Cruise

  • Ayutthaya: Historical Park

  • Chiang Mai: Wat Phra That Doi Suthep, Ethical Elephant Sanctuary Tour

  • Phuket: Beach Holiday

Tour B:

On this 22-day private tour, you'll see the highlights of Southeast Asia's top four countries! In Vietnam, you could take a Halong Bay Cruise to see breathtaking scenery, learn about traditional Vietnamese culture in Hanoi's Old Quarter, and visit the Cu Chi Tunnels in Saigon. Then, visit the world-famous Angkor Wat and Tonle Sap's stilt village in Cambodia. Enjoy a 2-day tour of Laos to experience rural life and witness the famous morning alms-giving ceremony before flying to Thailand. When arriving in Thailand, you will get up close and personal with elephants in Chiang Mai and visit must-see attractions in Bangkok.

Day 1-11 (Vietnam):

• Hanoi: Hoan Kiem Lake, Old Quarter, Water Puppet Show

• Halong Bay: Halong Bay Cruise

• Hue: Forbidden Purple City, Perfume River Boat Ride

• Hoi An: Ancient Town Exploration, Hoai River Boat Tour

• Ho Chi Minh City: City Tour, Cu Chi Tunnels

• My Tho - Can Tho: Mekong River Cruise

Day 12-14 (Cambodia):

• Siem Reap: Angkor Wat, Angkor Thom, Tonle Sap Lake

Day 15-16 (Laos):

• Luang Prabang: Alms-Giving Ceremony, Kuang Si Falls

Day 17-22 (Thailand):

• Chiang Mai: Baan Chang Elephant Park, Mount Doi Suthep

• Bangkok: Grand Palace, Wat Pho, Long-Tail Boat Ride

• Ayutthaya: Ayutthaya Historical Park, Wat Mahathat

Which plan do you like? Then I will tell me you the prices (could you pls tell me your travel date again?) because the price is related to the travel dates.

Or any suggestion? Could you pls tell me , then we can design this private tour for you according to your ideas .