• VSCode Version:
  1.28.2
• OS Version:
  Ubuntu Gnome 16.04.5 (x64)

Steps to Reproduce:
I search very often a symbol in current active file using by ctrl+shift+o.
I noticed that takes some inaccurate results than Sublime Text in cases like below.
symbols with Under and Upper case naming
example 1)
onSomeHandle()
onAnotherSomeHandle()
let search with words such as 'osh' using by ctrl+shift+o
the result element list are:
VS Code =>
onAnotherSomeHandle()
onSomeHandle()

Sublime Text=>
onSomeHandle()
onAnotherSomeHandle()

what I want is onSomeHandle().

example 2)
setDBook()
setDefineSome(bool)
onStoreDefineAddressBook()
let search with such as 'sdb'
the results :
VS Code =>
onStoreDefineAddressBook()
setDefineSome(bool)
setDBook()
Sublime Text =>
setDBook()
onStoreDefineAddressBook()
setDefineSome(bool)

what I want is setDBook()

On the candidates list, It doesn't focus to the symbol in where the cursor is on editor when search box is invoked by ctrl+shift+o, it always get focus at the top element.
Sublime Text focus to the symbol in which gets the cursor in editor.
In my experience, It gets better convenient in Sublime Text.

I'm new with VS Code, I have used Sublime Text and Eclipse for a few years.
I use always the searching by symbol while work.
I feels a bit more bad than Sublime Text with this feature,
I think this feature should key feature on mention to if not full IDE.