Kemukakan soalan dan belajar daripada pekerja bebas pakar
"hidden" in the sense client is "delete" your bids . reason
1. either client dont get what he or she is looking for from your "proposal"
2 . or your proposal is kind of weak so may be client dont like your bid so he or she is hidden your bid .
to avoid this situation wrte a strong proposal and bid on project .