Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thau luan so snippets" » "khau luan so snippets", "thai luan so snippets", "thau luat so snippets", "thau quan so snippets", "thau luan san 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: (((("thau luan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thau luan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thau luan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thau luan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.