Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham khai de snippets" » "tham khao de snippets", "ham khai de snippets", "than khai de snippets", "tham khi de snippets", "tham khoi de snippets", "tham thai den 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: (((("tham khai de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tham khai de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham khai de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham khai de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.