Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ngoc cau snippets" » "tran ngoc cau snippets", "van hoc cau snippets", "van nghe cau snippets", "van ngoc chau snippets", "van ngoc chu snippets", "van ngoc canh 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 ngoc cau 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 ngoc cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ngoc cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngoc cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.