Perhaps you should try some spelling variations:
"coder coder perceptions learning objects" » "coder coder perception learning objects" (Expand search), "coder coder perceptron learning objects" (Expand search), "coder coder perceptions regarding objects" (Expand search), "coder coders perceptions learning objects" (Expand search), "coder model perceptions learning objects" (Expand search), "coder power perceptions learning objects" (Expand search), "coder decoder perceptions learning objects" (Expand search), "code code perceptions learning objects" (Expand search), "decoder codec perceptions learning objects" (Expand search)
"_ python python python programming" » "_ pythons python python programming" (Expand search), "_ piton python python programming" (Expand search), "_ pitons python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder coder perceptions learning objects") OR ("_ python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder coder perceptions learning objects\") OR (\"_ python python python programming\"))".
• Removing quotes may allow a broader search: (( coder coder perceptions learning objects ) OR ( _ python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder coder perceptions learning objects") OR ("_ python python python programming"))*.