Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hoa thiet » hoc thiet, toan thiet, hoa viet
trinh han » trinh quan
dung cong » dung trong
ho thiet » hoc thiet, so thiet, hoc thieu
han dung » chan dung, han duong, hanh dung
tan toan » tap toan, van toan, dan toan

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) OR (hoa thiet)) tach - hanh trinh han dung cong ((tan toan) or (tan tran)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (hoa thiet)) tach - hanh trinh han dung cong ((tan toan) OR (tan tran)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) OR (hoa thiet)) tach - hanh trinh han dung cong ((tan toan) or (tan tran)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) OR (hoa thiet)) tach - hanh trinh han dung cong ((tan toan) or (tan tran)) cau*.