Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"duong doi cac snippets" » "duong loi cac snippets", "dung doi cac snippets", "huong doi cac snippets", "duong doi cach snippets", "duong voi cac snippets", "duong do cac 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: (((("hang java java snippets") or ("duong doi cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("duong doi cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( duong doi cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("duong doi cac snippets"))) or ("locating bug code snippets"))*.