Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"van chinh cau snippets" » "va chinh cau snippets", "van thinh cau snippets", "hanh chinh cau snippets", "van chinh chau snippets", "van chinh ca snippets", "van chinh can snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"using java code snippets\") OR (\"van chinh cau snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( van chinh cau snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("van chinh cau snippets"))) OR ("locating bug code snippets"))*.