Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong vinh le snippets" » "cong vinh code snippets", "cong trinh le snippets", "trong vinh le snippets", "cong viec le snippets", "cong dinh le snippets", "cong vinh v.le snippets", "cong thinh le snippets"
"python using java snippets" » "python using data 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 vinh le snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong vinh le snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong vinh le snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong vinh le snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.