Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham hang du snippets" » "pham hoang du snippets", "pham hong du snippets", "pham hanh du snippets", "pham hang dau snippets", "pham nang 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: (((("pham hang 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: (((("pham hang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham hang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham hang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.