Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van da nghe snippets" » "van day nghe snippets", "van va nghe snippets", "van dang nghe snippets", "van dao nghe snippets", "van dau nghe snippets", "van dan nghe 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 da nghe 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 da nghe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van da nghe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van da nghe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.