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