Construction loans are typically short term that then get rolled into conventional mortgages at the end of the construction period. Since the actual construction loan is short term, you cannot combine it with a long-term land loan as well.
You could do the two separate loans up front to buy the land and finance the construction, then at the end roll both into a conventional mortgage to close out the land and construction loans. This option will only work if you do all three through the same lender. Trying to engage various lenders will require a whole new refinance process, which I very much doubt you would want to go through.
These are sometimes called combo loans, since they aggregate several different loan products in one "transaction."
Not a lot of places do land loans, so I would suggest first find a lender that will give you a land loan and set an appoint with a loan representative. Explain what you are trying to do and see what they can offer you. You might have better luck with credit unions as well instead of traditional banks.