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