Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao cong le snippets" » "cac cong le snippets", "cao dang le snippets", "cua cong le snippets", "cao cuong le snippets", "cao cong li snippets", "cao hong le 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: (((("cao cong le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao cong le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao cong le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao cong le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.