Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"chon cac thuoc snippets" » "chon cay thuoc snippets", "chon cao thuoc snippets", "chon tac thuoc snippets", "cho cac thuoc snippets", "thong cac thuoc snippets", "hoc cac thuoc 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 ("chon cac thuoc snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("chon cac thuoc snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( chon cac thuoc snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("chon cac thuoc snippets"))) or ("locating bug core snippets"))*.