Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet ca chan snippets" » "viet ha chan snippets", "viet co chan snippets", "viet a chan snippets", "viet cam chan snippets", "viet ca chang snippets", "viet can chan 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 ca chan 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 ca chan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet ca chan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet ca chan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.