Follow these simple search rules for best search results

THE ASTERISK
The asterisk is very important in searches and we recommend you to use it often. If, for example you want to search a particular word such as Hotel you can enter it and you will find all the portal pages that mention Hotel. If you want to find hoteliers it will not find it so you could put hotel*  for all words that being with "hotel". The asterisk can also stand for the beginning of a word so if you are looking for SOMETHINGation you can search under *ation and you will find all the pages with words ending in ....ation.

AND, OR, AND NOT
Use AND to join two words that must both be in the search result. E.g.  chair AND metal (to find metal chairs). OR is used to extend widen the search result when just one of the two words search for is enough.
E.g.: association OR union (you will find all texts where one or other of the words appears) AND NOT is used to search one word while excluding the second.. E.g. Franc* AND NOT franchising (finds all the words starting with  "franc" excluding "franchising".