Perhaps you should try some spelling variations:
personal communication » interpersonal communication
developpement de » developpement des, developpement durable
rheologie les » rheologie des, theologie des, theologie der
les variation » les variations, does variation, de variation
variation 4 » variations 4, variation _, variation 6
2 personal » 1 personal, 4 personal
de afrique » de l'afrique, en afrique, l afrique

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

• Performing a fuzzy search may retrieve terms with similar spellings: rheologie les variation 4 2 personal communication ((a l) OR (a la)) developpement de afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "rheologie les variation 4 2 personal communication ((a l) OR (a la)) developpement de afrique.*".