Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hang dan cu snippets" » "hang dau cu snippets", "hang ban cu snippets", "tang dan cu snippets", "hang dan cua snippets", "hang dan ca snippets", "hang dan su 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: (((("hang dan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang dan cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang dan cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang dan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.