Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi nhan dot snippets" » "khi nha dot snippets", "thi nhan dot snippets", "chi nhanh dot snippets", "khi nhan dat snippets", "khi nhay dot snippets", "khi nhan dong 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: (((("khi nhan dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi nhan dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi nhan dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi nhan dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.