Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van thuc di snippets" » "va thuc di snippets", "dan thuc di snippets", "van thu di snippets", "van thuc dia snippets", "van thuc doi snippets", "van thuc du 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: (((("van thuc di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van thuc di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van thuc di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thuc di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.