Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tai viet do snippets" » "thi viet do snippets", "mai viet do snippets", "tai lieu do snippets", "tai viet dao snippets", "tai viet doi snippets", "tai viet o 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: (((("tai viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tai viet do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tai viet do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tai viet do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.