Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don vinh cuu snippets" » "don tinh cuu snippets", "son vinh cuu snippets", "dong kinh cuu snippets", "don dinh cuu snippets", "don sinh cua snippets", "don dinh cu 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: (((("don vinh cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don vinh cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don vinh cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don vinh cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.