Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan minh don snippets" » "doan minh don snippets", "dang minh don snippets", "van minh don snippets", "dan minh doan snippets", "dan minh dong snippets", "dan minh son 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 minh don 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 minh don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan minh don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan minh don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.