Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"que thi doan snippets" » "que thai doan snippets", "que thi hoan snippets", "que thi loan snippets", "que tai doan snippets", "que toi doan snippets", "quy thi doan 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: (((("que thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("que thi doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( que thi doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("que thi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.