Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tang du snippets" » "van thang du snippets", "van trang du snippets", "van nang du snippets", "van hang dau snippets", "van dang duc 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: (((("van tang 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: (((("van tang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.