Perhaps you should try some spelling variations:
duong trong » dung trong
dieu chinh » dieu hanh, dien hinh, dia chinh
tranh tuan » tran tuan, tranh luan, thanh tuan
tuan duong » tuyen duong, tuong duong, van duong
dieu minh » trieu minh, dieu hanh, diep tinh
trong dan » trong dang, trong san, trong tan
dan toan » van toan, dan than, manh toan
toan tap » toan 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 ((dieu minh) OR (dieu chinh)) - canh tranh tuan duong trong dan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu minh) OR (dieu chinh)) - canh tranh tuan duong trong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu minh) OR (dieu chinh)) - canh tranh tuan duong trong dan toan tap*.