Hi Masud, You need to tweak your thumbnail for 2 reasons, Your text is getting cropped and try to make it more catchy. write some one feature or a thing that attracts clients on the thumbnail itself. I think this should work to get more clicks. If you getting clicks or start getting clicks after the thumbnail is improved and still not getting any order or inquiry messages. This is can be indication of bad description, In that case you will need to Improve your description too.
Go and explore same Gig of successful buyers and try not to copy it but create something unique of yours that one on is providing.
For example you explore for niche buyer, instead of just landing page, try "Product landing page" or "Landing page for real estate", these are just examples.
I think targeting particular buyer should work too.
All the best,
Gusai.