Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
cong bang » cuong bang, dong bang, hong bang
tung cua » trung cua, tuong cua, dung cua
hang cau » hang ca, nhung cau, nang cao
hang dau » hang va, hang tai

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

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