Perhaps you should try some spelling variations:
"using java java snippets" » "using data java snippets"
"vu dong code snippets" » "vu dong co snippets", "vu dong che snippets", "vu dong cong snippets", "vu duong code snippets", "tu dong code snippets", "vu cong code snippets"
"locating bug core snippets" » "locating bug code snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java java snippets") OR ("vu dong code snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java java snippets\") OR (\"vu dong code snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using java java snippets ) OR ( vu dong code snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java java snippets") OR ("vu dong code snippets"))) OR ("locating bug core snippets"))*.