Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc danh de snippets" » "quoc khanh de snippets", "cuon danh de snippets", "hoc danh de snippets", "quoc hanh de snippets", "quoc dan de snippets", "quoc dang de 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 danh 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 danh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc danh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc danh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.