Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chu trang so snippets" » "thu trang so snippets", "chu trong so snippets", "thuc trang so snippets", "chu trang son snippets", "chu trang o snippets", "chu trang do 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: (((("chu trang so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chu trang so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chu trang so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chu trang so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.