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