Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong dieu co snippets" » "dang dieu co snippets", "dong dien co snippets", "dong hieu co snippets", "dong dieu con snippets", "dong lieu co snippets", "dong deu 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: (((("dong dieu 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: (((("dong dieu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong dieu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong dieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.