Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong da doan snippets" » "dong dat doan snippets", "dong dao doan snippets", "dong ha doan snippets", "dong du doan snippets", "dong dao doanh snippets", "dong tap doan 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 da doan 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 da doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong da doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong da doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.