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