Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc thai cua snippets" » "duc hai cua snippets", "duc thah cua snippets", "duc tham cua snippets", "duc than cua snippets", "duc tai cuc snippets", "duc tri cua 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: (((("duc thai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc thai cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc thai cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc thai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.