Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc la rong snippets" » "duc la trong snippets", "duc ta rong snippets", "duc lam trong snippets", "duc lai rong snippets", "duc lam rong snippets", "duc lan rong 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 la rong 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 la rong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc la rong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc la rong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.