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