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