How can I get a very small waist with bigger hips with surgery?

It is difficult to comment without at least pictures. In general however sculpting with liposuction and additional curves added using fat grafting can be done to enhance shape and provide a better silhouette of your body.

To enhance your hips and slim down your midsection you can try fat grafting. Fat can be removed from your midsection then transferred to your hips. However, it's important that your midsection will respond well to this treatment. Sometimes, sagging skin needs to be removed as well to achieve a smaller waist circumference. This would involve a tummy tuck. Fat grafting might not be necessary, however. Sometimes, enough can be achieved with liposuction and/or a tummy tuck to give you the shape you want.

    Liposuction of the waist with fat transfer to the hips may be a very good option for you, but pictures or an exam would be necessary to make a determination.   Find an expert at liposuction and fat grafting.Kenneth Hughes, MDLos Angeles, CA

Sometimes body contouring can really
help to give you the ideal results you are looking for. Sometimes this can be
done with liposuction and a tummy tuck versus one or the other. In addition, fat
grafting to the areas that you want increased can make all the difference in
the world, which is taking fat from one area and placing it in an area you
want. In essence, we would need to see you in consultation or have your pictures
posted to give you the ideal situation as to what would give you the best
results. The results you are looking for can be achieved.

I think that you need to be seen in person to determine what might or might not be possible.  If you have enough fat reserves it should be possible to achieve bigger hips.

Based on your description, it appears that liposuction with fat grafting to your hips would make a difference. However a physical examination or pictures are necessary to determine the indications for an abdominoplasty in a healthy patient. Hope this helps.

Both liposuction and tummy tuck are good options to improve waistline.  In both, you can transfer the liposuctioned fat to augment your hips.  The right choice for you depends on your anatomy.  So, it will be a good idea to get evaluated by a plastic surgeon, board certified by the American Board of Plastic Surgery.  Good luck!