Using Google

Topic One; World War II Participants
When you put just "World War II" in the search bar, you get about 154,000,000 results. To narrow it down, click on 'Advanced Search' and put "World War II" into the 'exact phrase' section instead of the 'all of these words' section. Your results are narrowed down to about 62,900,000.

with all of the words__________participants, nations, countries
with the exact phrase_________World War II
with at least one of the words__participants, nations, countries
without the words___________weapons

You end up with only about 1 million results, rather than 154 million, making it easier for you to find the website that you're looking for.


Topic Two; 9/11
If you enter "September 11, 2001" into the google search bar, you get 334,000,000 results. To narrow it down, click on 'Advanced Search' and put "September 11, 2001" into the 'exact phrase' section instead of the 'all of these words' section. Your results are narrowed down to about 1,970,000.

with all of the words__________hijack, planes, twin towers
with the exact phrase_________September 11, 2001
with at least one of the words__hijack, planes, twin towers
without the words___________conspiracy, government, theory

After this, you only end up with about 154 results.