There is hardly any intelligence in databases. They only look for given chains of characters, which can be words, abbreviations, or just about anything else.
product* finds product, products, production, productive, productivity, productization, productize…
There is the set of hits, which include searchword1 and another set with searchword2
When you use the truncation mark, you find a set of hits, which contain at least one word beginning in the given way. See #1.
”supply chain”
”life cycle cost model*”
quality AND control means that all hits contain the given words
manufacture OR produce means that all hits must contain either one of the given words
energy NOT nuclear means that uout of the set, which contains the word energy, hits with the word nuclear will be excluded
quality W/2 control* means that we find e.g. quality control, controlling quality, controlling product quality, quality and productivity control…
”supply chain*” AND performance AND (metrics OR measur*)
means that we search measuring the performance of supply chains. There is a phrase (notice the truncation mark within the phrase) followed by a single word and finally two alternative words combined with the OR operator within brackets. The brackets tell the system that that notion must be performed first and the retrieved set is then combined with the two other sets.
Information sources are used via university portals. The portal search, like searching via LUT Primo, covers most of the available databases at the same time. When the searcher wants to search an individual database's own content, they access the database's user interface via the university portal. The latter gives a more precise result but then all required databases must be searched individually. Using the portal search feature gives a broader result, which, alternatively, can be even too wide to study.
Regardless of the used search service, using the available help service (help, info etc.) is worthwhile. There you find precise information about using that particular service.