Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc ham rong snippets" » "duc pham trong snippets", "duc pham cong snippets", "duc nam trong snippets", "duc pham rong snippets", "duc kham rong snippets", "duc tham 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 ham 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 ham rong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc ham rong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc ham rong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.