Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
hanh trinh » canh tranh, hanh chinh
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
dang cong » dung cong
cua dang » cua cong, cua ban
toan cac » toan cao, toan cau, toan xac

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

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