Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham vu hoat snippets" » "pham tu hoat snippets", "pham va hoat snippets", "pham vi hoat snippets", "pham ve hoat snippets", "pham vu hoan 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 vu hoat 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 vu hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham vu hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham vu hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.