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