Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra phan con snippets" » "tri phan con snippets", "toan phan con snippets", "than phan con snippets", "tra phan cong snippets", "tra phan bon snippets", "tra phan co 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: (((("tra phan con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra phan con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra phan con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra phan con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.