Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
hanh tranh » canh tranh, hanh trinh, lanh tranh
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cua trong » cua truong, cua trung, qua trong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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) OR (hanh trang)) cua trong cong san toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet danh - ((hanh tranh) OR (hanh trang)) cua trong cong san toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - ((hanh tranh) OR (hanh trang)) cua trong cong san toan ban*.