Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa lap doc snippets" » "khoa tap doc snippets", "hoa lap doc snippets", "khoa cap doc snippets", "khoa lap doi snippets", "khoa lap dong snippets", "khoa phap doc 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: (((("khoa lap doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa lap doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa lap doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa lap doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.