Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tre van cong snippets" » "tre van dong snippets", "tre van phong snippets", "tre phan cong snippets", "te van cong snippets", "tre can cong snippets", "tre dan 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: (((("tre 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: (((("tre van cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tre van cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tre van cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.