Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan tac cho snippets" » "dan toc cho snippets", "dan bac cho snippets", "dan tay cho snippets", "dan tac chon snippets", "dan dac cho snippets", "dan tap cho 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: (((("dan tac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan tac cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan tac cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan tac cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.