Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"duc van da snippets" » "duc van code snippets", "duc va da snippets", "duc tan da snippets", "duc manh da snippets", "duc van dao snippets", "duc van dau snippets", "duc van dan snippets"
"python using java snippets" » "python using data 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 van da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc van da snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( duc van da snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc van da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.