Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh phan » trinh han, trinh quan, thanh phan
phan thong » phan thuong, phan hong, phan tong
thong cong » trong cong, tong cong, thong thong
hoc dieu » hoc thieu, hoc hien
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 dieu hanh - canh trinh phan thong cong san toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - canh trinh phan thong cong san toan ban*.