Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hoc nghe snippets" » "duc hoc nghien snippets", "duc khoe nghe snippets", "duc hoc he snippets", "duoc hoc nghe snippets", "luc hoc nghe snippets", "du hoc nghe 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 hoc nghe 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 hoc nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hoc nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hoc nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.