Tracheostomy

In Medline and CINAHL, you can get more articles about Tracheostomy as follows:

MeSH:
Tracheostomy OR "Intubation, Intratracheal"

CINAHL:
Tracheostomy OR "Endotracheal Tubes"

but watch out for irrelevant results.

Wait Lists

In Medline, if you are looking for information on wait lists, try all three of these MeSH:

Waiting Lists
Crowding
Forecasting

Use OR to combine them and then AND them to the department or service that you're interested in, e.g.:

"Emergency Service, Hospital" AND ("Waiting Lists" OR Crowding OR Forecasting)

Assessing clinical learning

If you're looking up information about testing/assessing/evaluating student nurses, here are some useful CINAHL headings:

Using the Evaluation subheading:
MH "Learning/EV"
MH "Students, Nursing+/EV"
MH "Education, Nursing+/EV"

Additional CINAHL headings:
Educational Measurement
Student Performance Appraisal
--Narrower Term: Competency Assessment