Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuong dan co snippets" » "huong dan co snippets", "xuong san co snippets", "tuong dan co snippets", "xuong dan cho snippets", "xuong dang co snippets", "xuong danh co 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: (((("xuong dan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuong dan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuong dan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuong dan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.