Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"so phan chep snippets" » "so phan che snippets", "so han che snippets", "so phap che snippets", "co phan chep snippets", "hoc phan chep snippets", "hoa phan chep 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: (((("so phan chep snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("so phan chep snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( so phan chep snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("so phan chep snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.