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