Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chu » theo chieu, cho chu, chao chu
chu tinh » chau tinh, chua tinh, cuu tinh
mang cua » manh cua, dung cua, ban cua
thong tu » phong tuc, thong tin, thong ke
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 chu tinh - hanh ((mang cua) or (thong tu)) nhung cong ((ty toan) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu tinh - hanh ((mang cua) OR (thong tu)) nhung cong ((ty toan) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: theo chu tinh - hanh ((mang cua) or (thong tu)) nhung cong ((ty toan) or (tap toan)) cau*.