Perhaps you should try some spelling variations:
theo thuat » thien thuat, thu thuat, te thuat
thuat tinh » thuat trinh, thuat kinh, thuat hinh
hanh tranh » canh tranh, hanh trinh, hanh trang
cua dong » chua dong, cua cong, cua nong
cua dang » cua cong, cua ban
tap toan » tap doan, tap quan, bai toan
ty toan » ly toan, huy toan, tam toan

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 tinh - hanh tranh ((cua dong) or (cua dang)) cong ((ty toan) OR (tap toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thuat tinh - hanh tranh ((cua dong) OR (cua dang)) cong ((ty toan) OR (tap toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo thuat tinh - hanh tranh ((cua dong) or (cua dang)) cong ((ty toan) OR (tap toan)) ban".
• Adding a wildcard symbol may retrieve word variants: theo thuat tinh - hanh tranh ((cua dong) or (cua dang)) cong ((ty toan) OR (tap toan)) ban*.