Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thong cua » thong quan, thong tu, huong cua
nang phan » nang phat, nang thanh, dung phan
nang quan » ban quan, nang suat
kho danh » khao danh, khop danh, kho canh
tung cua » trung cua, tuong cua, dung cua
doi kho » doi khi, doi pho, dai kho

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi kho danh - thanh ((tung cua) or (thong cua)) nhung cong ((nang phan) OR (nang quan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi kho danh - thanh ((tung cua) OR (thong cua)) nhung cong ((nang phan) OR (nang quan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi kho danh - thanh ((tung cua) or (thong cua)) nhung cong ((nang phan) OR (nang quan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi kho danh - thanh ((tung cua) or (thong cua)) nhung cong ((nang phan) OR (nang quan)) cau*.