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