Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"nao hoc trinh snippets" » "nao doc trinh snippets", "nao hoc tinh snippets", "nao hoc sinh snippets", "cao hoc trinh snippets", "bao hoc trinh snippets", "nang hoc trinh snippets"
"locating bug core snippets" » "locating bug code snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("nao hoc trinh snippets"))) OR ("locating bug core snippets"))~.
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( nao hoc trinh snippets ))) or ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("nao hoc trinh snippets"))) or ("locating bug core snippets"))*.