Perhaps you should try some spelling variations:
"cong luong core snippets" » "cong thuong core snippets", "nang luong core snippets", "cong dong core snippets", "cong luong cong snippets", "cong luong che snippets"
"cong dung core snippets" » "cuong dung core snippets", "cong dong core snippets", "thong dung core snippets", "cong dung cong snippets", "cong dung co snippets", "cong dung con snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("cong dung core snippets") OR ("cong luong core snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dung core snippets") OR ("cong luong core snippets"))) OR ("locating bug code snippets")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"cong dung core snippets\") OR (\"cong luong core snippets\"))) or (\"locating bug code snippets\"))".
• Removing quotes may allow a broader search: (((( cong dung core snippets ) OR ( cong luong core snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dung core snippets") OR ("cong luong core snippets"))) or ("locating bug code snippets"))*.