Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong su hoc snippets" » "dang su hoc snippets", "dong tu hoc snippets", "dong luc hoc snippets", "dong du hoc snippets", "dong so hoc 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 su hoc 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 su hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong su hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong su hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.