Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi luan cac snippets" » "thi lan cac snippets", "thi xuan cac snippets", "thi loan cac snippets", "thi luan dac snippets", "thi luan tac snippets", "thi luat cac 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 luan cac 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 luan cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi luan cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi luan cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.