Perhaps you should try some spelling variations:
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java grippers"
"hang toan thuc snippets" » "hang ton thuc snippets", "dang toan thuc snippets", "hoang thoan thuc snippets", "hang toan hoc snippets", "hang dan thuc snippets", "hang nhan thuc snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung java java slippers\") OR (\"hang toan thuc snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java slippers ) OR ( hang toan thuc snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java slippers") OR ("hang toan thuc snippets"))) OR ("locating bug code snippets"))*.