Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu hai dong snippets" » "thu hai duong snippets", "thu thai dong snippets", "thu ha dong snippets", "thu nhap dong snippets", "thu hang dong 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: (((("thu hai dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu hai dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu hai dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu hai dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.