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