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