Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don trau cua snippets" » "con trau cua snippets", "don tam cua snippets", "con trai cua snippets", "don tru cua snippets", "don tranh cua snippets", "don tu cua 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 trau cua 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 trau cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don trau cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don trau cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.