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