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