Perhaps you should try some spelling variations:
opec communication » open communication, optic communication, ec communication
typologie does » typologie des, typologie der, typologie cices
does variation » de variation, der variation, die variation
development de » development d, development ds, developpement de
der opec » der oper, des opec, der opfer
4 sme » 4 same, _ sme, 4 smt
4 see » _ see, 4 sex, i see

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typologie does variation _ der opec communication ((4 sme) OR (4 see)) development de l'afrique.~".
• Adding a wildcard symbol may retrieve word variants: typologie does variation _ der opec communication ((4 sme) OR (4 see)) development de l'afrique.*.