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