Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban voi can snippets" » "ban moi can snippets", "ba voi can snippets", "ban noi can snippets", "ban voi cac snippets", "ban voi cong snippets", "ban voi hang 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: (((("ban voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban voi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban voi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.