Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham xuan cu snippets" » "pham luan cu snippets", "pham quang cu snippets", "pham van cu snippets", "pham xuan du snippets", "pham tuan cu snippets", "pham xuan co 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: (((("pham xuan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham xuan cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham xuan cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham xuan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.