Perhaps you should try some spelling variations:
multiword expression » multiword expressions
silkworm expression » isoform expression
silico expression » co expression, micro expression, vitro expression

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((silico expression) OR (((silkworm expression) OR (multiword expression)))) fundamentals (section OR sections).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((silico expression) or (((silkworm expression) OR (multiword expression)))) fundamentals (section or sections)".
• Adding a wildcard symbol may retrieve word variants: ((silico expression) or (((silkworm expression) OR (multiword expression)))) fundamentals (section or sections)*.