Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong quoc ca snippets" » "dang quoc ca snippets", "dong duoc ca snippets", "hoang quoc ca snippets", "dong quoc cac snippets", "dong quoc cao snippets", "dong quoc va 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: (((("dong quoc ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong quoc ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong quoc ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong quoc ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.