Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat ke chi snippets" » "nhat ve chi snippets", "nhat ky chi snippets", "nhat le chi snippets", "nhat ke che snippets", "nhat ke thi 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: (((("nhat ke chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat ke chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat ke chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat ke chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.