Perhaps you should try some spelling variations:
methodology empirical » methods empirical
development matters » development patterns, development partners, development centers
empirical options » empirical sections, empirical equations, empirical fractions
de communication » mobile communication, online communication
path development » health development, youth development, tech development
options why » options key, options while, options only
costs path » cost path, costs cash, costs part
why space » why scale
matters a » matters _
space de » espace de, space die, space dead

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

• Adding a wildcard symbol may retrieve word variants: methodology empirical options why space de communication costs path development matters a.*.