Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban duc dan slippers" » "ban duoc dan slippers", "van duc dan slippers", "ban dac dan slippers", "ban duc tan slippers", "ban duc dai slippers", "ban duc dan slippery", "ban duc dan grippers"
"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: (((("ban duc dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban duc dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban duc dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban duc dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.