Perhaps you should try some spelling variations:
"dong tinh hoi snippets" » "dong kinh hoi snippets", "dong tin hoi snippets", "cong tinh hoi snippets", "dong trinh hoi snippets", "dong tinh hoc snippets", "dong tinh hai snippets"
"hang java java snippets" » "hang 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: (((("dong tinh hoi snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tinh hoi snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tinh hoi snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tinh hoi snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.