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