Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet cac ho snippets" » "vien cac ho snippets", "viet ca ho snippets", "viet bac ho snippets", "viet cac hop snippets", "viet cac hoc snippets", "viet cac co 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 cac ho 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 cac ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet cac ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet cac ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.