Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc huy toan snippets" » "doc huy tran snippets", "doc huu toan snippets", "doc huy hoang snippets", "duc huy toan snippets", "dong huy toan snippets", "doc thuc 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: (((("doc 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: (((("doc huy toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc huy toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc huy toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.