Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham hanh he snippets" » "pham thanh he snippets", "pham anh he snippets", "pham hang he snippets", "pham hanh che snippets", "pham hanh ve snippets", "pham hanh de 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 hanh he 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 hanh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham hanh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham hanh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.