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