Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong tinh so snippets" » "cong trinh so snippets", "cong vinh so snippets", "cong thanh so snippets", "cong tinh son snippets", "cong tinh soc snippets", "cong dinh so 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 tinh so 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 tinh so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tinh so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tinh so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.