Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
preface selection » preface selections, preface section, interface selection
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
method preface » author preface
selection des » selection de, selektion des, l'election des
des based » aes based, ses based, codes based
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: method preface selection des based data communications costs 4 developpement en afrique.*.