Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan trua cua snippets" » "dan tra cua snippets", "doan truc cua snippets", "dan trung cua snippets", "dan tru cua snippets", "dan qua 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: (((("dan trua 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: (((("dan trua cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan trua cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan trua cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.