Here's the link for the digitised newspapers for Australia from 1803 to more recent times. The National Library of Australia's advanced search options include selecting just one newspaper, or a number of newspapers; just a single date or a range (month/year/decade or from/to dates etc; keywords/phrases and 'without' keywords, Articles and/or advertising and/or lists and/or family notices (bdm announcements !) and number of words in the article etc.
You can even contribute to the OCR transcription that runs alongside the image; you can save the image as pdf, jpeg etc, add tags or simply take a snip of the image yourself ....
http://trove.nla.gov.au/ndp/del/search?adv=y This is a link to the free to search website funded by the National Library of Australia. The NLA is continually uploading digitised newspapers (and other holdings) to their website. I find the armchair experience a much better proposition over the searching through the original newspaper holdings in the Public Libraries. Before the web it was of course a difficult task to get to the various capital cities in the various states of Australia and access the hardcopies of the newspapers held by each of the various State based Public Libraries.
Another Antipodean link is for Papers Past, which is New Zealand's digitised newspapers. It too is quite easy to search from the armchair and without undue time spent looking at articles not relevant to your specific search. It too is a website that continues to upload newspapers as they digitise them.
http://paperspast.natlib.govt.nz/cgi-bin/paperspastYou will find that the newspapers at those two links include quite a deal of "foreign" news and not just their own local news specific to the city/town/locality where they were published.
Hope this helps,
Cheers, JM (7th generation NSW, Australia centric with several generations of family from NZ as well, so I have been 'into' newspapers from around the early 1960s re my family history hobby)