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