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