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