Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc thanh da snippets" » "duc thang da snippets", "duc tan da snippets", "de thanh da snippets", "duc thanh dat snippets", "duc thanh dam snippets", "duc thanh dan 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: (((("duc thanh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc thanh da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc thanh da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc thanh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.