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