Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
chat nhung » chat ngung, thuat nhung, cua nhung
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
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 tinh chat nhung cong san toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - hanh tinh chat nhung cong san toan ban*.