Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
dong trong » duong trong, dung trong, cong trong
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh sinh » hanh tinh, hanh dinh, hanh chinh
hinh sinh » tinh sinh, hinh dinh, hinh kinh
trong van » trong cac
va dong » van dong, ha dong, xa dong
van van » tan van, san van, van vat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (thien thanh)) - ((hanh sinh) OR (hinh sinh)) va dong trong van van ban~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien thanh)) - ((hanh sinh) or (hinh sinh)) va dong trong van van ban*.