Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc duc cua snippets" » "ngo duc cua snippets", "ngoc dung cua snippets", "ngoc de cua snippets", "ngoc doc cua snippets", "ngoc luc cua snippets", "ngoc tuc cua 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 duc cua 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 duc cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc duc cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc duc cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.