Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat ngo doan snippets" » "dat ngoc toan snippets", "dat ngo van snippets", "dat ngo xuan snippets", "dai ngo doan snippets", "bat ngo doan snippets", "dat nuoc doan 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: (((("dat ngo doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dat ngo doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat ngo doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat ngo doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.