Spoiler alert! Secret achievements.

Do not read this if you want to find the secret achievements on your own!

Here are the answers to finding the secret achievements in the game:

Help!
To find the help achievement, you need to open the in-game help. The in-game help is located in the 4 buttons menu under the gears button and then the question mark button. Once you close the in-game help again the achievement will be awarded.

There and back again.
The there and back again requires you to visit 50 farms. If you want an easy way of doing that, go and water the co-op trees and click back and forth between the first 2 farms on that list if the co-op is not large enough to finish the achievement at once.

Dog whisperer.
To complete this achievement you need to upgrade your dog house to level 5 and click it to teach the dog the 5th trick.

Logistics expert.
You need to find the 4 different ways of transporting goods to the bakery. Missed one? Click these four links to see what the 4 different ways are and which one you missed:

1) http://prntscr.com/3wp9ik
2) http://prntscr.com/3wp6ie
3) http://prntscr.com/3wpim9
4) http://prntscr.com/3wp6yp

(thanks Skull32 for the screenshots!)

Info expert.

You need to click the info button on all the flower farm buildings. If you click a building, you see a blue button with a white i in the ring menu. Click that button and close the menu that opens. Repeat this for all 10 buildings. Only buildings that belong to your flower farm count; houses and decorations are universal for all farms so they do not count. Missed a building? Here’s a list of all the buildings you need to click:

  1. Meadow
  2. Shop
  3. Distillery
  4. Mixing plant
  5. Olive grove
  6. Citrus orchard
  7. Cabin
  8. Apiary
  9. Fence
  10. Gate

Hoping to have helped you with these answers,
The Larino cooperative