Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham dan cu snippets" » "pham dang cu snippets", "pham van cu snippets", "pham lan cu snippets", "pham dan cua snippets", "pham dan ca snippets", "pham dan su 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 dan 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 dan cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham dan cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham dan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.