Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan vang cua snippets" » "dan vung cua snippets", "van vang cua snippets", "dan quang cua snippets", "dan mang cua snippets", "dan hang cua snippets", "dan tang cua 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: (((("dan vang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan vang cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan vang cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan vang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.