Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che hoang le snippets" » "le hoang le snippets", "che hoat le snippets", "thi hoang le snippets", "che hoang de snippets", "che hong le snippets", "che hoang lam 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: (((("che hoang 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: (((("che hoang le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che hoang le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che hoang le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.