Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khanh thu do snippets" » "nhanh thu do snippets", "thanh thu do snippets", "khanh thuan do snippets", "khanh thuy do snippets", "khanh khu do snippets", "khanh tu do 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: (((("khanh thu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khanh thu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khanh thu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh thu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.