Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu kinh cua snippets" » "thu minh cua snippets", "thuat kinh cua snippets", "nha kinh cua snippets", "thu sinh cua snippets", "thu tinh cua snippets", "thu dinh 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: (((("thu kinh 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: (((("thu kinh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu kinh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu kinh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.