Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thon viet du snippets" » "thong viet du snippets", "tran viet du snippets", "thon viet duc snippets", "thon viet duy snippets", "thon viet tu 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: (((("thon viet du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thon viet du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thon viet du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thon viet du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.