Perhaps you should try some spelling variations:
"using hang cong snippets" » "using hang code snippets", "using manga cong snippets", "song hang cong snippets", "using half cong snippets", "using dang cong snippets", "using hang nong snippets", "using thanh cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("using hang cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("using hang cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( using hang cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("using hang cong snippets"))) or ("locating bug core snippets"))*.