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