Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"he ninh viet snippets" » "he sinh vien snippets", "he anh viet snippets", "he tinh viet snippets", "he kinh viet snippets", "he sinh viet snippets", "he ninh viet slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("he ninh viet snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("he ninh viet snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( he ninh viet snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("he ninh viet snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.