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