Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh trong » hanh trang, anh trong, hinh trong
tong duong » tuong duong, thong duong, dong duong
trong cua » truong cua, thong cua, trong ca
duong van » duong va, luong va, dang van
cua tong » cua cong, cua dong, cua nong
van tuan » van quan, van ban, anh tuan
tuan tai » toan tai, quan tai, tan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((dieu hanh) or (thien thanh)) - hanh trong cua tong duong van tuan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (thien thanh)) - hanh trong cua tong duong van tuan tai.
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (thien thanh)) - hanh trong cua tong duong van tuan tai*.