Perhaps you should try some spelling variations:
nhiet tach » chiet tach
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc nhiet » hoc thiet, hoc nghien, hoc hien
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dung cong
trinh han » trinh quan
han ban » hang ban, van ban, can 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 nhiet tach - hanh tranh cua cong cong trinh han ban~.
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - hanh tranh cua cong cong trinh han ban*.