Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dong tac van snippets" » "cong tac van snippets", "dong tai van snippets", "dong bac van snippets", "dong tac vang snippets", "dong cac van snippets", "dong tac va 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 ("dong tac van snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("dong tac van snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dong tac van snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dong tac van snippets"))) or ("locating bug core snippets"))*.