Perhaps you should try some spelling variations:
thuyet hach » thuyet mach, thuyet xac, thuyet cac
hoc thuyet » hoc chuyen
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
van tuan » van quan, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuyet hach - hanh tranh cua thong cong ((van tuan) or (van ban)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet hach - hanh tranh cua thong cong ((van tuan) OR (van ban)) cu.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet hach - hanh tranh cua thong cong ((van tuan) or (van ban)) cu*.