Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet van chu snippets" » "viet nam chu snippets", "viet anh chu snippets", "viet ha chu snippets", "viet van chi snippets", "viet van phu snippets", "viet 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: (((("viet 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: (((("viet van chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet van chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet van chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.