Perhaps you should try some spelling variations:
"creating a d snippets" » "creating _ d snippets", "creating a 3d snippets"
"reading a trac snippets" » "reading _ trac snippets", "reading 1 trac snippets", "reading 2 trac snippets", "reading va trac snippets", "reading tap trac snippets", "reading anh trac snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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: "((((\"reading a trac snippets\") OR (\"creating a d snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( reading a trac snippets ) OR ( creating a d snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("reading a trac snippets") OR ("creating a d snippets"))) OR ("locating bug code snippets"))*.