To successfully search for information on your topic, it is best to determine the main concepts and then find keywords for those concepts. The keywords can become your search words. In general, you should search library databases approximately 3 keywords, rather than your whole topic question or a sentence.
For example, your research question is "What kind of design considerations could improve the quality of life for elderly Alzheimer's patients ?" Mark the keywords.
Then begin generating synonyms and related words to help you develop a search strategy.
||quality of life
In many databases, you could start your search by typing design elderly alzheimer's psychology and it would automatically turn that search into:
design AND elderly AND alzheimer's AND psychology
This is a search using Boolean logic.
A more advanced Boolean search could be done like this:
(design OR "built environment") AND (elder* OR aged OR "older people") AND (dementia OR alzheimer's) AND ("quality of life" OR psychol*)
In this example the * will also find different endings for the words, such as elders, elderly or psychology, psychological.
Here are some more tips for choosing keywords.
You can also find additional keywords by searching your topic in a database, finding a relevant item and noting the terms used in the description of that item.