Collocations for fundamentals - noun

basic, underlying
good (AmE), solid (esp. AmE), sound, strong (esp. AmE)
The figures confirm that Brazil's sound economic fundamentals remain in place.

very
The new law strikes at the very fundamentals of a free press.

business, economic

teach
grasp, learn, master, understand
We quickly mastered the basic fundamentals of navigation.

go back to, return to (both esp. AmE)
The government went back to fundamentals, concentrating on avoiding food shortages.

change, improve