Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tim hoc cong snippets" » "tim hoc co snippets", "tim cac cong snippets", "tim hoc dung snippets", "tin hoc cong snippets", "tam hoc cong snippets", "tim ho cong 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: (((("tim hoc cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tim hoc cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tim hoc cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tim hoc cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.