Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua cua do snippets" » "quan cua do snippets", "quang cua do snippets", "qua quan do snippets", "qua cua dao snippets", "qua cua bo snippets", "qua cua 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: (((("qua cua do 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 do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua cua do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua cua do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.