Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc ngoc lo snippets" » "vu ngoc lo snippets", "bui ngoc lo snippets", "duc ngoc ly snippets", "duc ngoc le snippets", "duc ngoc long 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: (((("duc ngoc lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc ngoc lo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc ngoc lo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc ngoc lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.