Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet ta de snippets" » "viet tay de snippets", "viet ha de snippets", "viet tu de snippets", "viet ta deu snippets", "viet va de snippets", "viet te de 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 ta de 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 ta de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet ta de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet ta de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.