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