Perhaps you should try some spelling variations:
khong tieng » trong tieng, khong dien, hong tien
thanh trung » thanh tung
hanh trinh » canh tranh, hanh chinh
chieu xanh » chieu sach, chieu sang, chieu tinh
thien anh » thien danh, tien anh, thien thanh
cua khong » hua khong, cua phuong, cua thuong
viet toan » viet hoan, viet tran, viet tuan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (thien anh)) - ((hanh trinh) or (thanh trung)) cua khong tieng viet toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (thien anh)) - ((hanh trinh) OR (thanh trung)) cua khong tieng viet toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (thien anh)) - ((hanh trinh) or (thanh trung)) cua khong tieng viet toan tap*.