Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh tranh » canh tranh, hanh trinh, hanh trang
trung cong » truong cong, trong cong, trung uong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 tach - hanh tranh cua trung cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - hanh tranh cua trung cong ((dan toan) OR (dan than)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - hanh tranh cua trung cong ((dan toan) or (dan than)) cau*.