Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len con von snippets" » "len cong von snippets", "lon con von snippets", "le con von snippets", "len dong von snippets", "len toan von snippets", "len chon van snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("len con von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len con von snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len con von snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len con von snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.