Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"de doi trong snippets" » "de doi tuong snippets", "de dot trong snippets", "de dong trong snippets", "te doi trong snippets", "ve doi trong snippets", "ke doi trong 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 ("de doi trong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("de doi trong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( de doi trong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("de doi trong snippets"))) or ("locating bug core snippets"))*.