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