Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lai van cua snippets" » "hai van cua snippets", "mai van cua snippets", "lai va cua snippets", "lai vang cua snippets", "lai ban cua snippets", "lai dan cua 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: (((("lai van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lai van cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lai van cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lai van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.