Bits and pieces/bobs
Definition 1 of 2
Pro Tip 1/3Context Matters
Use when referring to a collection of small, often unrelated items or details. 
Your report has all the bits and pieces, but it lacks structure.
Pro Tip 2/3Figurative Speech
Can be used metaphorically for non-physical collections like ideas. 
She gave us bits and pieces of her business plan.
Pro Tip 3/3Not Whole
Not a complete set; missing parts or not everything is present. 
After the party, we found bits and pieces of decorations all over.