Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai khong de snippets" » "hai phong de snippets", "dai khong de snippets", "hay khong de snippets", "hai khong he snippets", "hai khong do snippets", "hai khong ke 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: (((("python using java snippets") or ("hai khong de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("hai khong de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( hai khong de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("hai khong de snippets"))) or ("locating bug code snippets"))*.