Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hien hach » thien hach, hien hanh, hien nhanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong cac » cuong cac, cong tac, cong cau
cac chat » cao chat, cac thuat, cac nha
chat van » chat va, chat ban, chat ran

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hach - canh tranh cua thong cong cac chat van~.
• Adding a wildcard symbol may retrieve word variants: hoc hien hach - canh tranh cua thong cong cac chat van*.