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