Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan pham doi snippets" » "tuan pham doi snippets", "san pham doi snippets", "tac pham doi snippets", "tan pham do snippets", "tan pham moi snippets", "tan pham voi 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: (((("tan pham doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan pham doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan pham doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan pham doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.