Perhaps you should try some spelling variations:
simulation duration » simulation relation, simulation imitation, simulation solution
ecology simulation » technology simulation, recovery simulation, policy simulation
communications a » communications _, communications law, communications media
mine development » sme development, trade development, business development
development li » development lid, development lie, development lin
duration 5 » duration _, duration γ, duration 0
li afrique » l afrique, en afrique
a mine » _ mine, a mini, a mile

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

• Performing a fuzzy search may retrieve terms with similar spellings: ecology simulation duration 5 ((does a) OR (does _)) communications a mine development li afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ecology simulation duration 5 ((does a) OR (does _)) communications a mine development li afrique.*".