Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua cua doc snippets" » "quan cua doc snippets", "quang cua doc snippets", "qua quan doc snippets", "qua cua duoc snippets", "qua cua duc snippets", "qua cua hoc 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: (((("qua cua doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qua cua doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua cua doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua cua doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.