Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu ke ton snippets" » "thu ket ton snippets", "thua ke ton snippets", "thuc ke ton snippets", "thu ke toan snippets", "thu de ton snippets", "thu ke don 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: (((("thu ke ton snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu ke ton snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu ke ton snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu ke ton snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.