Perhaps you should try some spelling variations:
thuat tach » thuat sach, thuat mach, thuat tac
chong cong » thong cong, cuong cong, phong cong
hoc thuat » hoc thuyet, hoc thuc, hoc chat
tranh cac » trinh cac, thanh cac, tranh cai
cong cong » cong dong, trong cong, dung cong
dan toan » van toan, dan than, manh 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 thuat tach - canh tranh cac ((chong cong) or (cong cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuat tach - canh tranh cac ((chong cong) OR (cong cong)) dan toan ban*.