how to find results just in australia? you need to put .au at the end.

finding results in a particular time? you go to search tools then change it to ay time you want. 

how to find a perticular person? you need to put inverted commers

how to exclude items from  search. you need to put a minus sign there.

how do you know if a search is legitimate? look at some coments on it or you can search a diffrent sight.