Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
nhanh hung » thanh hung, nhanh hong, nhanh chuong
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hung cua » huong cua, chung cua, khung cua
chan cau » phan cau, can cau, chinh cau

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

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