Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"trinh vat tran snippets" » "trinh van tran snippets", "trinh luat tran snippets", "sinh vat tran snippets", "trinh vat ran snippets", "trinh vat trong snippets", "trinh vach tran snippets"
"locating bug core snippets" » "locating bug code snippets"

Try widening your search to All Fields.

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