Ah i see thanks Ckuan.
I know see that you have to delete the search word(s) in the box after pressing command and f and type in a new word followed by return. That then works for one word or a name. Unfortunately it does not work for multiple searches as i was hoping, hence why it was not working for me ( unless together as in a name ) but it is certainly much better than nothing so thank you very much for your help - it is much appreciated. I have also since been informed that google chrome multihighlighter does multiple search highlighting once you download it from chrome website so i have everything covered now thanks as i have done that and it works in a similar manner.
It is very odd that you cannot do multiple searches automatically as you can on pc in google. To be honest that was the only thing that was far more intuitive to me personally about using a pc but now i have these two functions which are actually better than the automatic pc function i am all sorted. Much obliged.
All the best.