Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
hanh trinh » canh tranh, hanh chinh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trinh van » trinh han, trinh quan, trinh toan
lang cong » dang cong, bang cong, hang cong
manh toan » thanh toan, tinh toan
van lang » van nang, va lang, van hang
dan toan » van toan, dan than, xuan toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - hanh trinh van lang cong ((dan toan) OR (((manh toan) OR (anh tuan)))) cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - hanh trinh van lang cong ((dan toan) or (((manh toan) or (anh tuan)))) cau*.