Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len ngoi de snippets" » "den nguoi de snippets", "len troi de snippets", "len ngoc de snippets", "len noi de snippets", "len nuoi de 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: (((("len ngoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len ngoi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len ngoi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len ngoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.