Perhaps you should try some spelling variations:
thuyet tach » thuyet mach, thuyet hach, thuyet xac
hoc thuyet » hoc chuyen
thong cong » tong cong, thong thong, phong chong
canh manh » lanh manh, canh tranh, cach mang
manh cua » doanh cua, ban cua
tan toan » tan tran, tap toan, van toan
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 thuyet tach - canh manh cua ((thong cong) or (trong cong)) tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet tach - canh manh cua ((thong cong) OR (trong cong)) tan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thuyet tach - canh manh cua ((thong cong) or (trong cong)) tan toan ban*.