Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi tang cua snippets" » "phap tang cua snippets", "thi trang cua snippets", "phi trong cua snippets", "phi mang cua snippets", "phi hang cua snippets", "phi tang luan 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: (((("phi tang 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: (((("phi tang cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi tang cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi tang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.