Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham tuan ve snippets" » "pham luan ve snippets", "pham xuan ve snippets", "pham thanh ve snippets", "pham tuan le snippets", "pham quan ve 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 tuan ve 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 tuan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tuan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tuan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.