Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket van chu snippets" » "ket va chu snippets", "viet van chu snippets", "ket doan chu snippets", "ket van chi snippets", "ket van phu snippets", "ket van cau 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: (((("ket van chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ket van chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket van chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket van chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.