Perhaps you should try some spelling variations:
"the theories lectures series" » "the theory lectures series", "the theory lecture series", "the theoretical lectures series", "the theories lecture series", "the theories lectures suivies", "the theories lectures scales"
"the others lectures strings" » "the others lectures curing", "the others lectures during", "the others structures strings", "the other lectures strings", "the other pictures strings", "the author's lectures strings"
"the others fractures series" » "the other fractures series", "the other fracture series", "the stress fractures series", "the others fracture series", "the others structures series", "the others fractures stress"

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: "((((\"the theories lectures series\") OR (\"the others lectures strings\"))) OR (\"the others fractures series\"))".
• Removing quotes may allow a broader search: (((( the theories lectures series ) OR ( the others lectures strings ))) OR ( the others fractures series )).
• Adding a wildcard symbol may retrieve word variants: (((("the theories lectures series") OR ("the others lectures strings"))) OR ("the others fractures series"))*.