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