Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
trinh toan » tinh toan, thanh toan, trinh han
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cam » trinh cam, tranh cac, tranh cai
hang cong » dang cong, hang nong, bang cong
cam hang » cam hoang, cam nang, cam hung
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 ((thien thanh) or (hieu manh)) - canh tranh cam hang cong trinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hieu manh)) - canh tranh cam hang cong trinh toan ban*.