Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan kinh he snippets" » "than kinh he snippets", "phan dinh he snippets", "phan minh he snippets", "phan kinh te snippets", "phan hinh he snippets", "phan kinh 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: (((("phan kinh 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: (((("phan kinh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan kinh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan kinh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.