Perhaps you should try some spelling variations:
thuyet tach » thuyet mach, thuyet hach, thuyet xac
hoc thuyet » hoc chuyen
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dong cong » duong cong, dung cong, dang cong
cua dong » chua dong, cua cong, cua dang
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than
van tuan » van quan, van ban, 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 tach - hanh trinh cua dong cong ((((dan toan) or (dan than))) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet tach - hanh trinh cua dong cong ((((dan toan) OR (dan than))) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet tach - hanh trinh cua dong cong ((((dan toan) or (dan than))) or (van tuan)) cau*.