Perhaps you should try some spelling variations:
"dung xuan ho snippets" » "duong xuan ho snippets", "dung luan ho snippets", "dung quan ho snippets", "dung xuan ha snippets", "dung xuan huy snippets", "dung xuan thu 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 xuan ho 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 xuan ho snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung xuan ho snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung xuan ho snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.