Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai huy toan snippets" » "dai huy tran snippets", "dai huu toan snippets", "dai huy hoang snippets", "dao huy toan snippets", "mai huy toan 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: (((("dai huy toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dai huy toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai huy toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai huy toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.