Perhaps you should try some spelling variations:
phuong trinh » chuong trinh, cong trinh, huong tran
chua phuong » cua phuong, chu phuong, cuu phuong
manh trung » manh tung, thanh trung, manh hung
hanh trung » thanh trung, hanh trang, danh trung
trinh toan » tinh toan, thanh toan, trinh han
chi sang » chi lang, chieu sang, chi chang
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - ((hanh trung) or (manh trung)) sua chua phuong trinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - ((hanh trung) OR (manh trung)) sua chua phuong trinh toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chi sang - ((hanh trung) or (manh trung)) sua chua phuong trinh toan ban*.