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