Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"wei long van snippets" » "wei yulong van snippets", "wei liang van snippets", "hai long van snippets", "wei luong van snippets", "wei song van snippets", "wei lang van snippets", "wei long van slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("wei long van snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("wei long van snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei long van snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei long van snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.