Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc cua he snippets" » "duoc sua he snippets", "nuoc cua he snippets", "doc cua he snippets", "duoc cua che snippets", "duoc cua te snippets", "duoc cua le 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: (((("duoc cua 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: (((("duoc cua he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc cua he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.