Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tai viet con snippets" » "thi viet con snippets", "mai viet con snippets", "tai lieu con snippets", "tai viet co snippets", "tai diet con snippets", "tai giet con 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 con 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 con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tai viet con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tai viet con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.