Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc tuan lo snippets" » "ngo xuan lo snippets", "ngoc tuan le snippets", "ngoc tuan do snippets", "ngoc thuan loi 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: (((("ngoc tuan lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc tuan lo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc tuan lo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc tuan lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.