Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet hach » thien hach, thuyet hach, thiet hai
nhung cong » dung cong, thong cong, nhung don
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
san bao » van bao, san bai, san giao
bao cau » bao cao, bo cau, tao 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 hach - thanh trung cua ((nhung cong) or (((hang cong) or (hang nong)))) san bao cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - thanh trung cua ((nhung cong) OR (((hang cong) OR (hang nong)))) san bao cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh trung cua ((nhung cong) or (((hang cong) or (hang nong)))) san bao cau*.