Perhaps you should try some spelling variations:
"tinh quang hoe snippets" » "tinh quang hoi snippets", "tinh quang hoc snippets", "tinh quang hop snippets", "trinh quang hoe snippets", "dinh quang hoe snippets", "minh quang hoe snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("tinh quang hoe snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tinh quang hoe snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tinh quang hoe snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tinh quang hoe snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.