Also check my trekearth gallery out for more information or my flickr here :
http://www.flickr.com/photos/nhanfoto/
If you are coming in the lunar new year I will suggest you to visit floating market in CanTho province. If you are interested in fishing village you can go to TraVinh to visit badong beach - which you can see in my photos on trekearch - Take some days to visit PhuQuoc; catch a PhuQuoc express from Rach Gia then you can go back to Ha tien and explore HaTien, after that you can also visit ChauDoc; there are many things to do in ChauDoc. You can visit champa and cambodian villages... Hope you have a good trip.