Can't find what you're looking for ? Search the NHA Site

Enter a word/s or phrase into the search box below and press the search button

...If it's not here or you can't find it, tell us

Download the

Search hints:

You can enter individual search words, such as Astronomy.
Using a capital as the first letter will find the exact word. For example, Technology as a search term will only find the word Technology, but not words like biotechnology (or technology).
Using all lower case text will find words and parts of words. For example, radio will find words like radio-astronomer, as well as radio.
To find a combination of words in a phrase, embed them in quotes, for example "genetic engineering".
To find a combination of words, not necessarily in sequence or together (Boolean AND), prefix the words or quoted phrases with a '+' sign. For example, +biosphere +"climate change" will find documents that include both the word biosphere and the phrase climate change.
To find any one of several words (Boolean OR), enter the words without quotes. For example, radio x-ray quasar will find any or all of the words wherever they occur. Avoid using prepositions and indefinite or definite articles in this sort of search or you'll be swamped with unhelpful results. (For example, using the words science in the news without quotes will produce a lot a unhelpful references to pages with 'in' and 'the'.)
To exclude words or phrases (Boolean NOT), prefix them with a '-' sign. For example, -administration will exclude pages that include the word administration.
Spelling is important, but don't be too concerned if you're unsure because the search engine will find near matches as well.

page updated 14th November 2008

Search For:
Match:	Any word All words Exact phrase Sound-alike matching