How to rank for product model name?

Hi, I'm working as a marketer/web dev in small distributor company.

Basically, we import stuff and sell it to our local business (B2B)

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I want to rank for certain product model name.

Let's say the exact model name is "AB123 YZ "

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After some optimization, i can see my web page on the first page when i search

"ab123 yz" but not when i search "ab123yz" (no space between)

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The one with space is the correct model name but one without the space seems to be searched more often.

All content of the current product page only includes "ab123 yz" but no other variations.

Does this mean that I have to mix those model name in my product page?

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Another example would be contracted product model name.

Let's say the exact model name is "AbcDef XZ 1234"

If i type that in google search, my product page ranks at 4th place,

but when i type "adxz 1234" it doesn't even rank.

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So my question is:

1. Do I have to mix all those variations in my content?
2. And if so, where do I put it? <title> tag? meta description? each paragraph?

Thank you very much