Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"buoc khoi he snippets" » "quoc hoi he snippets", "hoc khoi he snippets", "duoc hoi he snippets", "buoc khoa he snippets", "buoc khoi de snippets", "buoc khong he 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: (((("buoc khoi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("buoc khoi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( buoc khoi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("buoc khoi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.