Perhaps you should try some spelling variations:
"thai long hoc snippets" » "hai long hoc snippets", "thai cong hoc snippets", "thai dong hoc snippets", "thai long soc snippets", "thai long thuoc snippets"
"using a java snippets" » "using _ java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 a java snippets") or ("thai long hoc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a java snippets") OR ("thai long hoc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a java snippets ) or ( thai long hoc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a java snippets") or ("thai long hoc snippets"))) or ("locating bug code snippets"))*.