Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, hang cong
cua bang » chua bang, cua ban, cua dang
cong san » cong tac
van nhan » van phan, van thanh, danh nhan
ban than » ban thanh, van thanh, ban hang

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 danh - hanh tranh cua bang cong san ((van nhan) or (ban than))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - hanh tranh cua bang cong san ((van nhan) OR (ban than)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - hanh tranh cua bang cong san ((van nhan) or (ban than))*.