Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu tang co snippets" » "nhieu tang co snippets", "hieu lang co snippets", "hieu tieng co snippets", "hieu tang cho snippets", "hieu nang co snippets", "hieu tang 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: (((("hieu tang co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu tang co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu tang co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu tang co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.