Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc cao di snippets" » "quoc bao di snippets", "quoc cac di snippets", "quoc cho di snippets", "quoc cao dai snippets", "quoc cao 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 cao di 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 cao di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc cao di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc cao di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.