Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van linh cu snippets" » "van minh cu snippets", "van dinh cu snippets", "van binh cu snippets", "van linh tu snippets", "van dinh cuu 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: (((("van linh 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: (((("van linh cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van linh cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van linh cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.