Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chieu sang » chieu sach, chieu xanh, hieu lang
hien hanh » dieu hanh
ganh nang » anh nang, nganh nong, van nang
cua thong » cua thuong, cua khong, cua tong
nang cua » mang cua, hang cua, nang dua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (chieu sang)) - ganh nang cua thong cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (chieu sang)) - ganh nang cua thong cong dan than cau*.