Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
trinh toan » tinh toan, thanh toan, trinh han
theo hieu » theo chieu, theo tieu, thien hieu
hanh mang » nhanh mang, hanh trang, nhanh lang
cua khong » hua khong, cua phuong, cua thuong
cua dong » chua dong, cua cong, cua dang
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu quang - hanh mang ((cua khong) or (cua dong)) cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu quang - hanh mang ((cua khong) OR (cua dong)) cong trinh toan cau.
• Adding a wildcard symbol may retrieve word variants: theo hieu quang - hanh mang ((cua khong) or (cua dong)) cong trinh toan cau*.