Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den thanh ve snippets" » "de thanh ve snippets", "dinh thanh ve snippets", "dong thanh ve snippets", "den hanh ve snippets", "den thanh va snippets", "den thanh vien 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: (((("den thanh ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den thanh ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den thanh ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den thanh ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.