first and third plant not seem to be doing well. an advice how to take care of them would also be helpful. second plant is doing quite well and not sure how to stop it grow.

Can't put names to the first 2 (although I'll probably kick myself for not recognising them when some does).
The 3rd one is an Escallonia laevis. From the colour of the leaf it could be 'Gold Ellen' or 'Gold Brian'.
Gold Ellen grows taller than Gold Brian.

if they are the same plant its escallonia apple blossom. looks like it needs a good feed. it is semi evergreen so the yellowing leaves could just be old dieing ones.
they look like the same plant to me.

Centre pic confirm Escallonia 'Apple Blossom'. Seaburngirl, the other two are different plants - the lower one's yellowing leaves and leaf form might suggest an Azalea - the top one is hauntingly familiar, but nothing is coming to mind, Aimankay - it can be difficult to ID plain green, sickly plants. Have you noticed any flowers on either the first or the third plant at any time?

They all look like escallonia to me. Nos 1 & 3 have been pruned harder or more recently I think.

The first one does look like an Escallonia of some kind, I agree, but its hard to be certain.

Thanks peeps. I tried to add the full pix of the plants but it has removed the 3 old pix. I have searched escallonia apple blossom and it does look like the second plant so I am sure you guys have guessed it right.

1st and 3rd plant in my opinion are different.

Bamboo, i think i have an azalea at the front of my house which gives red flower and these two have different leaves than azalea. i have not seen any flower on plant 1 and 3 unlike 2 which has started to flower recently.

Beattie, i have pruned no. 2 more harder than the other 2 but it still grows and grows while the 1 and 3 seems not to be doing very well.

I've just remembered what the leaves on the first lot of pics, pic No. 1, reminded me of other than escallonia - Ceanothus, and if pic No. 1 above is Ceanothus, it certainly is rather sickly and could be a low growing variety such as C. thyrsiflorus 'repens'.
Haven't a clue as to the final picture, but I'd hack it right back to see what happens, looks awful as it is.
Your Escallonia Apple Blossom healthy, gets about 5 x 5 feet - unless its Peach Blossom, which gets 8 x 8 feet.

From the 1st set of pictures posted I would still go with my original suggestion. I've got a cutting off of one from my mother's garden that I've been comparing it with and it looks very similar indeed.