Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham khac de snippets" » "tham khao de snippets", "pham khac de snippets", "phap khac de snippets", "tham khac di snippets", "tham khac do snippets", "tham hac de 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 khac 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 khac de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham khac de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham khac de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.