Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"van dung core snippets" » "van dung cong snippets", "van dung co snippets", "van dung con snippets", "van dong core snippets", "xay dung core snippets", "tin dung core snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("hang java java snippets") or ("van dung core snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("van dung core snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( van dung core snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("van dung core snippets"))) or ("locating bug code snippets"))*.