on the 31th dec I find my bitch is tie with other dog both are same breed . around 4 weeks she went off her food I tried everything many dog food, chicken, beef , egg etc..she come to the bowl smell it and push the bowl away. she is no tired yet, she drink water. she is still active.

Was the mating planned?

her tits are now getting pink & large. I consult a vet, he say it may do to some infection. an give me ''cefpodoxime proxetil oral suspension ip'' . even after the medicine their is no significant change. i cannot perform any x ray or snaking, because i am from a village we don't have such felicity in our local vet hospital.

yes, it is the 11 day of her season.

she eat a little on midnight

Well, it's very normal for some dogs to go off their food during pregnancy.  Their hormones are all over the place and some of them can be very picky eaters right until after whelping. 

This is a time to experiment and tempt her with all kinds of foods - preferably meat-based - to get her to eat.  Avoid liver and avoid anything with calcium - like cheese or dairy products.  Choose meats...

I don't know what medication your vet gave, but I hope it was safe for a pregnant bitch...

https://www.cuteness.com/article/side-effects-cefpodoxime-proxetil-dogs

Cefpodoxime Proxetil Contraindications

Pregnant or nursing dogs, or dogs you intend to breed, should not receive cefpodoxime proxetil. The breeding contraindication holds true for male and female canines.

what can i do?

Did you tell your vet that your dog may be pregnant?  If so, I think you should place complaint against the vet and print and show that information.

Other than that, you can do nothing but wait and see what happens.  She may have puppies with birth defects or other physical issues, she may have dead or mummified puppies - it's impossible to say. 

Or you could have the Alizin injection to induce abortion - I believe that can be given up to 45 days into pregnancy.

Or you could ask for a gravid spay (hysterectomy with the pups).. 

This would be no more traumatic than a C section.

You would have no worries about her getting pregnant, or possible abnormal puppies.

Rearing a litter is very hard work, and finding the homes even harder, especially for an unplanned litter.