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