Can a 110 volt power tool be wired to work on 220v 50 mghz?

You would need to get a step down transformer to convert the 220 Volts to 120 Volts. I checked on the web it seems the Philippines use 60 hertz power.

You need a step down transformer 220 : 110 volts rated at least 500 watts. However,the 110 volts power tool shall turn faster even it is applied into correct voltage,because the frequency has 10 cycles difference. And power tool might burn out faster. Better buy an auto transformer that can be adjusted voltage from 0 to 110 volts output. Feed the power tool about 95 volts at 50 c/s shall last longer life.

no.

It's 50 Hz, not mghz whatever that is.

I'm assuming these are not portable tools but fixed mount tools like a table saw.

You would need a very large transformer as well as a frequency converter. Cheaper to sell the tools and buy new ones locally.

Portable tools are a different case.

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Power tools are powered by "universal" motors, i.e., dc series motors. IOW they will run on dc or ac (any frequency) but you still have to match the voltage from 110 to 220v. You can use one of those 1500 watt iron travel adapter voltage converter they sell on your local convienience store.

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Blenders, too.

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No