Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung van te snippets" » "duong van te snippets", "dung va te snippets", "dang van te snippets", "dung van de snippets", "dung van tu snippets", "dung van le 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: (((("dung van te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung van te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung van te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung van te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.