Perhaps you should try some spelling variations:
theo thuat » thien thuat, thu thuat, te thuat
thuat sach » thuat lanh, thuat san
trong tan » trong quan, trong cac, trong ca
cua dung » cua dang, qua dung, cua rung
cua dong » chua dong, cua cong, cua dang
tan phan » toan phan, than phan, van phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo thuat sach - canh tranh ((cua dung) OR (cua dong)) trong tan phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo thuat sach - canh tranh ((cua dung) OR (cua dong)) trong tan phan cac".
• Adding a wildcard symbol may retrieve word variants: theo thuat sach - canh tranh ((cua dung) OR (cua dong)) trong tan phan cac*.