Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van biet de snippets" » "can biet de snippets", "van viet de snippets", "nhan biet de snippets", "van biet den snippets", "van biet ve snippets", "van biet dac 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 biet de 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 biet de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van biet de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van biet de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.