Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vinh dung so snippets" » "vinh hung so snippets", "tinh dung so snippets", "dinh dung so snippets", "vinh dung co snippets", "vinh dung mo snippets", "vinh dung cho 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: (((("vinh dung 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: (((("vinh dung so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vinh dung so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vinh dung so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.