Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"trinh van can snippets" » "trinh han can snippets", "trinh quan can snippets", "trinh toan can snippets", "trinh van canh snippets", "trinh van ban snippets", "trinh ban can 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 code snippets") OR ("trinh van can snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java code snippets\") OR (\"trinh van can snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( trinh van can snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("trinh van can snippets"))) OR ("locating bug core snippets"))*.