Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet hach » thien hach, thuyet hach, thiet hai
hoc thiet » hoc thieu, hoc thuyet, hoc hien
gay thong » gay trong, may thong, giam thong
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan
phan cau » phan dau, phan cac, phan tu

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 hach - thanh trung ((gay thong) OR (giao thong)) cong sat phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet hach - thanh trung ((gay thong) OR (giao thong)) cong sat phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh trung ((gay thong) OR (giao thong)) cong sat phan cau*.