Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi xay do snippets" » "khoi bay do snippets", "phi xay do snippets", "noi xay do snippets", "khoi xa do snippets", "khoi may 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: (((("khoi xay 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: (((("khoi xay do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi xay do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi xay do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.