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