Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa mu cham snippets" » "khoa ma cham snippets", "kho mu cham snippets", "khoan muc cham snippets", "khoa tu cham snippets", "khoa vu cham snippets", "khoa qua cham 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 mu cham 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 mu cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa mu cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa mu cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.