Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi can do snippets" » "khoa can do snippets", "khoi nang do snippets", "hoc can do snippets", "khoi can bo snippets", "khoi ban do snippets", "khoi van 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 can 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 can do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi can do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi can do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.