Perhaps you should try some spelling variations:
"dung hay cham snippets" » "dung hay code snippets", "dung ha cham snippets", "dung hai cham snippets", "dung may cham snippets", "dung hanh cham snippets", "dung va cham snippets", "dung hay nhat snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java 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: (((("dung hay cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hay cham snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung hay cham snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hay cham snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.