Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
khia canh » kho canh, thi canh
trung dap » trung cap, trung dai, trung lap
trung dam » trung tam, trung dai, trong dam
doi khia » doi khi, noi khoa, hoi khoa
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khia canh - hanh ((trung dap) or (trung dam)) nhung cong tam toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khia canh - hanh ((trung dap) OR (trung dam)) nhung cong tam toan tap.
• Adding a wildcard symbol may retrieve word variants: doi khia canh - hanh ((trung dap) or (trung dam)) nhung cong tam toan tap*.