Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong linh de snippets" » "cuong linh de snippets", "cong vinh de snippets", "cong tinh de snippets", "cong sinh de snippets", "cong minh de snippets", "cong linh dien 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: (((("cong linh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong linh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong linh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong linh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.