Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong va nghe snippets" » "dung va nghe snippets", "dong ha nghe snippets", "luong va nghe snippets", "dong van nghe snippets", "dong ve nghe snippets", "dong va nghi 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 va nghe 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 va nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong va nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong va nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.