Perhaps you should try some spelling variations:
thuyet hach » thuyet mach, thuyet xac, thuyet cac
thiet hai » thiet bi, thi hai, thien tai
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
mang cua » manh cua, dung cua, ban cua
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((thiet hai) or (thuyet hach)) - hanh mang cua ((trong cong) or (dung cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((thiet hai) OR (thuyet hach)) - hanh mang cua ((trong cong) OR (dung cong)) dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((thiet hai) or (thuyet hach)) - hanh mang cua ((trong cong) or (dung cong)) dan toan cau*.