Perhaps you should try some spelling variations:
thiet phuong » thi phuong, theo phuong, viet phuong
phuong cong » phuong dong, phong cong, phung cong
chieu xanh » chieu sach, chieu sang, chieu tinh
toan thiet » hoan thien, luan thiet, toan tien
hoc chieu » hoc thieu, ho chieu, hoc hien
cong than » cong thanh, cong thang, cong tan
nhan cach » phan cac
phan xay » phan dau, van xay, phan van
phan lap » phan dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - tinh toan thiet phuong cong than ((((phan xay) or (nhan cach))) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - tinh toan thiet phuong cong than ((((phan xay) OR (nhan cach))) OR (phan lap)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - tinh toan thiet phuong cong than ((((phan xay) or (nhan cach))) or (phan lap))*.