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