Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"paul danh du snippets" » "pablo danh du snippets", "cau danh du snippets", "paul van du snippets", "paul danh dau snippets", "paul danh tu snippets", "paul dinh du 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: (((("paul danh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("paul danh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( paul danh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("paul danh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.