It is not easy to cover all those destinations for your trip to Vietnam as It will take you at least 3 weeks to get to all of these places. However It depends on your duration and needs we would recommend you to visit those first:

Higlights of Vietnam: includes Ho Chi Minh, Mekong delta, Hoi An , hue, Hanoi and Halong bay
this trip may take about 10 days.

The South of Vietnam: This trip is best for those who just want to break Vietnam in 2 trips, this trip will cover Ho Chi minh city, Mekong delta, Dalat, Nha trang, Hoi An, Hue.
you need about 7 to 10 days to get what is the best this trip offered.

High lights of South Vietnam: if you only have few days and rather just to see the abit of The South and spend more tim on the beach. we then reccommend you to take thi One.
you will visit: Ho Chi Minh, Mekong delta, Hue and then relax in Hoi An. It will take about 5 to 7 days at most.

If you are interest in North Vietnam we would like to suggest these:
Highlights of North Vietnam : This trip cover All farorite destination in the North.
Hanoi, Sapa, Halong Bay , you will have to spend about 8 to 10 day for this trip

Complete North Vietnam: If you love to spend more time to discover more culture and rural life of Vietnamese, we would love to assist you on this: Trip will cover Hanoi, Sapa, Mai Chau, Ninh Binh and Halong bay.

However If you would like to see the ultimate adventure Vietnam:
to discover remote areas and want to have close up to local life
and of course to visit those most beautiful and really exotic places of the North Vietnam please contact us now: Sales Team for your life time Travel of Vietnam http://www.asianatravelmate.com/.