Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri dan cu snippets" » "tri van cu snippets", "tri ban cu snippets", "thi dan cu snippets", "tri dan cua snippets", "tri dan ca snippets", "tri dan su 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: (((("tri dan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri dan cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri dan cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri dan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.