Perhaps you should try some spelling variations:
python couplings » boson couplings (Expand search), phonon coupling (Expand search), meson couplings (Expand search)
couplings lambda » couplings and (Expand search), coupling landau (Expand search)
decrease its » decreases its (Expand search), decrease with (Expand search), decrease in (Expand search)
its decrease » with decrease (Expand search), nts decreases (Expand search), to decrease (Expand search)
decrease std » decrease sod (Expand search), decrease and (Expand search), decrease at (Expand search)
std programs » seed programs (Expand search), and programs (Expand search), d programs (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease its decrease std programs ) OR ( python couplings lambda python programming ))~.