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