Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet dao de snippets" » "viet lao de snippets", "viet bao de snippets", "viet da de snippets", "viet dao den snippets", "viet nao de snippets", "viet dai 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 dao 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 dao de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet dao de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet dao de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.