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