Perhaps you should try some spelling variations:
trien thuat » thien thuat, trien hoat, chien thuat
thanh trien » thanh tien, thanh truyen, thanh vien
thuat chong » thuat chuong, thuat cong, thuat chung
chong cong » cong cong, thong cong, cuong cong
chau tinh » cuu tinh, cua tinh, cac tinh
tap toan » tap doan, bai toan
tap quan » tac quan, hai quan
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chau tinh) or (ha tinh)) - thanh trien thuat chong cong ((tap toan) OR (tap quan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chau tinh) OR (ha tinh)) - thanh trien thuat chong cong ((tap toan) OR (tap quan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chau tinh) or (ha tinh)) - thanh trien thuat chong cong ((tap toan) OR (tap quan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chau tinh) or (ha tinh)) - thanh trien thuat chong cong ((tap toan) OR (tap quan)) cau*.