Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai lieu hoc snippets" » "tai lieu hoc snippets", "da lieu hoc snippets", "dai bieu hoc snippets", "dai lieu khoa snippets", "dai li hoc 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: (((("dai lieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dai lieu hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai lieu hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai lieu hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.