Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che thi hoa snippets" » "chu thi hoa snippets", "chi thi hoa snippets", "khe thi hoa snippets", "che thi hoan snippets", "che thi ha snippets", "che thi hong 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: (((("che thi hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che thi hoa snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che thi hoa snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che thi hoa snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.