Some folks have complained about the built in forum search facility not working as well as they would like. Here is a possible fix. It is a little tricky for the non technical, however you only have to set it up once and you will be able to use this to search any web site, not just the BCUK forum."...Could you help a little with how to do this please..."
I am using the Google Chrome web browser, it should work fine in other browsers.
Open up a web page, in this case I am using the Google search page.
Add a bookmark to the bookmark bar (the word google indicates the presence of the new bookmark).
Right click (or ctrl click) the new bookmark to bring up some menu options, click 'Edit'.
A window appears showing the properties for the bookmark.
I have replaced the name 'Google' with the words 'Search this Site', you can name it whatever you want, STS, SEARCH or whatever.
I then replace the URL with the following text.
Click 'Save' and then navigate to a website that you plan to search, in this case 'BushcraftUK'. Then click your new search bookmark.
A window appears into which you can type your search terms.
I am searching for the word 'Mors'.
My search results.
If you wish to exclude some search terms, type them into the search box with a - directly in front of them, they will then be excluded from the search.
searching for 'cheddar' brings up a surprisingly large number of cheesy hits on the forum.
searching for 'cheddar stilton' brings up even more cheesy threads.
searching for 'cheddar -stilton' brings up only the cheddar related threads that do not also refer to stilton.
There some other tweaks available, more here.