Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khuc voi con snippets" » "chua voi con snippets", "hoc voi con snippets", "hue voi con snippets", "khuc voi cong snippets", "khuc voi chon snippets", "khuc voi can 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: (((("khuc voi 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: (((("khuc voi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khuc voi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khuc voi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.