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