Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi dong de snippets" » "hoi dong de snippets", "khi dong de snippets", "kho dong de snippets", "khoi dung de snippets", "khoi dong da snippets", "khoi dong 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 dong de 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 dong de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi dong de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi dong de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.