Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc nghe so snippets" » "hoc nghien so snippets", "khoe nghe so snippets", "hoc he so snippets", "hoc nghe son snippets", "hoc nghe co snippets", "hoc nghiep so 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: (((("hoc nghe so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc nghe so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc nghe so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc nghe so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.