Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tan cay snippets" » "van tuan cay snippets", "van ban cay snippets", "van tai cay snippets", "van tan ca snippets", "van tao cay snippets", "van tac cay 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 tan cay 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 tan cay snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tan cay snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tan cay snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.