Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viec tang ca snippets" » "viec cong ca snippets", "viec ban ca snippets", "viec tai ca snippets", "viec tang cua snippets", "viec hang ca snippets", "viec tang ma 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: (((("viec tang 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: (((("viec tang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viec tang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viec tang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.