Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi kiem ton snippets" » "thi kim ton snippets", "thi lien ton snippets", "thi hien ton snippets", "thi kiem toan snippets", "thi kiem mon snippets", "thi kiem trong 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 kiem ton 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 kiem ton snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi kiem ton snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi kiem ton snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.