Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa tri cac snippets" » "khoa tai cac snippets", "khoa tre cac snippets", "khoan tai cac snippets", "khoa tri mac snippets", "khoa tri dac 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: (((("khoa tri 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: (((("khoa tri cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tri cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tri cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.