Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"locating bug core snippets" » "locating bug code snippets"
"van dan dat snippets" » "van ban dat snippets", "ban dan dat snippets", "van dao dat snippets", "van dung dat snippets", "van dong dat snippets", "van dinh dat 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 dan dat 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 dan dat snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( using java code snippets ) OR ( van dan dat snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") OR ("van dan dat snippets"))) OR ("locating bug core snippets"))*.