Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dem van cong snippets" » "dem van dong snippets", "dem van phong snippets", "dem phan cong snippets", "diem van cong snippets", "dam van cong snippets", "de van cong 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: (((("dem van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dem van cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dem van cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dem van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.