Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong khen ca snippets" » "dong chen ca snippets", "dong khung ca snippets", "dong dien ca snippets", "dong khien cau snippets", "dong khan cap snippets", "dong when can 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: (((("dong khen ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong khen ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong khen ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong khen ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.