Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi cao so snippets" » "khoi can so snippets", "hoc cao so snippets", "hoi co so snippets", "khoi cao son snippets", "khoi co so snippets", "khoi cao su 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: (((("khoi cao 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: (((("khoi cao so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi cao so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi cao so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.