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