Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quy mat can snippets" » "quy dat can snippets", "quy luat can snippets", "quy nhat can snippets", "quy bat can snippets", "quy mat dan snippets", "quy mao can 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: (((("quy mat can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quy mat can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quy mat can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quy mat can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.