Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"va tiep du snippets" » "va thiet du snippets", "va tieng du snippets", "va trien du snippets", "va tiep de snippets", "va tiep do snippets", "va tiep cua 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 tiep du 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 tiep du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va tiep du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va tiep du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.