Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chat viet du snippets" » "cham viet du snippets", "nhat viet du snippets", "chuan viet du snippets", "chat viet duc snippets", "chat viet duy snippets", "chat viet tu 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: (((("chat viet du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chat viet du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chat viet du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chat viet du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.