Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"da viet cho snippets" » "da viec cho snippets", "da viet co snippets", "da viet theo snippets", "dao viet cho snippets", "dai viet cho snippets", "dan viet cho 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: (((("da viet cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("da viet cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( da viet cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("da viet cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.