Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luu van cuc snippets" » "luu van code snippets", "cuu van cuc snippets", "luan van cuc snippets", "luu hanh cuc snippets", "luu van duc snippets", "luu van luc snippets", "luu van cu 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: (((("luu van cuc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luu van cuc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luu van cuc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luu van cuc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.