Perhaps you should try some spelling variations:
nhung chong » nhung cong, nhung phong, nhung phuong
thien anh » thien danh, tien anh, thien thanh
hanh sinh » hanh dinh, hinh sinh, hanh chinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
chong van » thong van, hong van, phong van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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 anh)) - ((hanh sinh) OR (hanh tinh)) va nhung chong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dieu hanh) OR (thien anh)) - ((hanh sinh) OR (hanh tinh)) va nhung chong van toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((dieu hanh) or (thien anh)) - ((hanh sinh) OR (hanh tinh)) va nhung chong van toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((dieu hanh) or (thien anh)) - ((hanh sinh) OR (hanh tinh)) va nhung chong van toan cao*.