Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cap nhung » cam nhung, vap nhung, dap nhung
cong cap » cung cap, cong cau, cong cac
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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 cong cap nhung cong san than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh cong cap nhung cong san than cau*.