Internal pages not showing in Google results

Hi,

I woiuld like to rank better in the search engines for a fibreglass company website.

https://www.pmb-fibreglass.co.zz

I have placed the products that the company makes on seperate internal pages eg.
canoes, water tanks, guard houses etc.

I need these individual pages to rank in Google for their respective keywords e.g
pietermaritzburg guard house

At the moment when I use such search terms I am generally only seeing the home page in the results.

How can I tell google to use the internal pages in the results?

Thank you

Alastair