Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
cua thuong » cua truong, cua phuong, ca thuong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh mang » nhanh mang, hanh trang, nhanh lang
cuong tap » luong tap, luong tai, cong tan
mang cua » manh cua, dung cua, ban cua
cong tac » cong ty
quan lap » quan luan, quang lam, quan lang

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 - hanh mang cua thuong ((cuong tap) OR (cong tac)) quan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet hach - hanh mang cua thuong ((cuong tap) OR (cong tac)) quan lap".
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - hanh mang cua thuong ((cuong tap) OR (cong tac)) quan lap*.