Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi hieu co snippets" » "cao hieu co snippets", "chi tiet co snippets", "co hieu co snippets", "chi hieu so snippets", "chi hieu bo snippets", "chi hieu ca 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: (((("chi hieu 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: (((("chi hieu co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi hieu co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi hieu co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.