Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan son dk snippets" » "xuan toan dk snippets", "xuan sinh dk snippets", "xuan hoan dk snippets", "xuan so dk snippets", "xuan son d snippets", "xuan son da 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: (((("xuan son dk snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan son dk snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan son dk snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan son dk snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.