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