Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai van cua snippets" » "dao van cua snippets", "dai han cua snippets", "dai va cua snippets", "dai vang cua snippets", "dai ban cua snippets", "dai dan 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: (((("dai van 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: (((("dai van cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai van cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.