Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"va hieu ve snippets" » "van hieu ve snippets", "va dieu ve snippets", "cao hieu ve snippets", "va hieu va snippets", "va hieu van 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 hieu ve 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 hieu ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va hieu ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va hieu ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.