Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cham hat do snippets" » "cham mat do snippets", "pham nhat do snippets", "nham phat do snippets", "cham hat doi snippets", "cham hat dao snippets", "cham hat 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: (((("cham hat 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: (((("cham hat do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cham hat do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cham hat do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.