Perhaps you should try some spelling variations:
"luong chat hoc snippets" » "luong cac hoc snippets", "luong cua hoc snippets", "luong ha hoc snippets", "luong chat hoa snippets", "luong chat thom snippets", "luong cho hoc 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: (((("luong chat hoc snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong chat hoc snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong chat hoc snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong chat hoc snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.